Filter content by your device's configured languages (#354)

app.json

@@ -24,6 +24,9 @@
     },
     "web": {
       "favicon": "./assets/favicon.png"
-    }
+    },
+    "plugins": [
+      "expo-localization"
+    ]
   }
 }

ios/Podfile.lock

@@ -100,6 +100,8 @@ PODS:
     - ExpoModulesCore
   - ExpoKeepAwake (12.0.1):
     - ExpoModulesCore
+  - ExpoLocalization (14.1.1):
+    - ExpoModulesCore
   - ExpoModulesCore (1.2.5):
     - React-Core
     - React-RCTAppDelegate
@@ -592,6 +594,7 @@ DEPENDENCIES:
   - expo-dev-menu-interface (from `../node_modules/expo-dev-menu-interface/ios`)
   - ExpoImagePicker (from `../node_modules/expo-image-picker/ios`)
   - ExpoKeepAwake (from `../node_modules/expo-keep-awake/ios`)
+  - ExpoLocalization (from `../node_modules/expo-localization/ios`)
   - ExpoModulesCore (from `../node_modules/expo-modules-core`)
   - EXSplashScreen (from `../node_modules/expo-splash-screen/ios`)
   - EXUpdatesInterface (from `../node_modules/expo-updates-interface/ios`)
@@ -705,6 +708,8 @@ EXTERNAL SOURCES:
     :path: "../node_modules/expo-image-picker/ios"
   ExpoKeepAwake:
     :path: "../node_modules/expo-keep-awake/ios"
+  ExpoLocalization:
+    :path: "../node_modules/expo-localization/ios"
   ExpoModulesCore:
     :path: "../node_modules/expo-modules-core"
   EXSplashScreen:
@@ -848,6 +853,7 @@ SPEC CHECKSUMS:
   expo-dev-menu-interface: 6c82ae323c4b8724dead4763ce3ff24a2108bdb1
   ExpoImagePicker: 270dea232b3a072d981dd564e2cafc63a864edb1
   ExpoKeepAwake: 69f5f627670d62318410392d03e0b5db0f85759a
+  ExpoLocalization: f26cd431ad9ea3533c5b08c4fabd879176a794bb
   ExpoModulesCore: 397fc99e9d6c9dcc010f36d5802097c17b90424c
   EXSplashScreen: cd7fb052dff5ba8311d5c2455ecbebffe1b7a8ca
   EXUpdatesInterface: dd699d1930e28639dcbd70a402caea98e86364ca

package.json

@@ -59,6 +59,7 @@
     "expo-camera": "~13.2.1",
     "expo-dev-client": "~2.1.1",
     "expo-image-picker": "~14.1.1",
+    "expo-localization": "~14.1.1",
     "expo-media-library": "~15.2.3",
     "expo-splash-screen": "~0.18.1",
     "expo-status-bar": "~1.4.4",

src/lib/api/feed-manip.ts

@@ -2,6 +2,7 @@ import {AppBskyFeedFeedViewPost} from '@atproto/api'
 import lande from 'lande'
 type FeedViewPost = AppBskyFeedFeedViewPost.Main
 import {hasProp} from '@atproto/lexicon'
+import {LANGUAGES_MAP_CODE2} from '../../locale/languages'
 
 export type FeedTunerFn = (
   tuner: FeedTuner,
@@ -180,32 +181,30 @@ export class FeedTuner {
     }
   }
 
-  static englishOnly(tuner: FeedTuner, slices: FeedViewPostsSlice[]) {
+  static preferredLangOnly(langsCode2: string[]) {
-    // TEMP
+    const langsCode3 = langsCode2.map(l => LANGUAGES_MAP_CODE2[l]?.code3 || l)
-    // remove slices with no english in them
+    return (tuner: FeedTuner, slices: FeedViewPostsSlice[]) => {
-    // we very soon need to get the local user's language and filter
-    // according to their preferences, but for the moment
-    // we're just rolling with english
-    // -prf
       for (let i = slices.length - 1; i >= 0; i--) {
-      let hasEnglish = false
+        let hasPreferredLang = false
         for (const item of slices[i].items) {
           if (
             hasProp(item.post.record, 'text') &&
             typeof item.post.record.text === 'string'
           ) {
             const res = lande(item.post.record.text)
-          if (res[0][0] === 'eng') {
+            const contentLangCode3 = res[0][0]
-            hasEnglish = true
+            if (langsCode3.includes(contentLangCode3)) {
+              hasPreferredLang = true
               break
             }
           }
         }
-      if (!hasEnglish) {
+        if (!hasPreferredLang) {
           slices.splice(i, 1)
         }
       }
     }
+  }
 }
 
 function getSelfReplyUri(item: FeedViewPost): string | undefined {

src/locale/languages.ts

@@ -0,0 +1,557 @@
+interface Language {
+  code3: string
+  code2: string
+  name: string
+}
+
+export const LANGUAGES: Language[] = [
+  {code3: 'aar', code2: 'aa', name: 'Afar'},
+  {code3: 'abk', code2: 'ab', name: 'Abkhazian'},
+  {code3: 'ace', code2: '', name: 'Achinese'},
+  {code3: 'ach', code2: '', name: 'Acoli'},
+  {code3: 'ada', code2: '', name: 'Adangme'},
+  {code3: 'ady', code2: '', name: 'Adyghe; Adygei'},
+  {code3: 'afa', code2: '', name: 'Afro-Asiatic languages'},
+  {code3: 'afh', code2: '', name: 'Afrihili'},
+  {code3: 'afr', code2: 'af', name: 'Afrikaans'},
+  {code3: 'ain', code2: '', name: 'Ainu'},
+  {code3: 'aka', code2: 'ak', name: 'Akan'},
+  {code3: 'akk', code2: '', name: 'Akkadian'},
+  {code3: 'alb', code2: 'sq', name: 'Albanian'},
+  {code3: 'ale', code2: '', name: 'Aleut'},
+  {code3: 'alg', code2: '', name: 'Algonquian languages'},
+  {code3: 'alt', code2: '', name: 'Southern Altai'},
+  {code3: 'amh', code2: 'am', name: 'Amharic'},
+  {code3: 'ang', code2: '', name: 'English, Old (ca.450-1100)'},
+  {code3: 'anp ', code2: 'Angika', name: 'angika'},
+  {code3: 'apa', code2: '', name: 'Apache languages'},
+  {code3: 'ara', code2: 'ar', name: 'Arabic'},
+  {
+    code3: 'arc',
+    code2: '',
+    name: 'Official Aramaic (700-300 BCE); Imperial Aramaic (700-300 BCE)',
+  },
+  {code3: 'arg', code2: 'an', name: 'Aragonese'},
+  {code3: 'arm', code2: 'hy', name: 'Armenian'},
+  {code3: 'arn', code2: '', name: 'Mapudungun; Mapuche'},
+  {code3: 'arp', code2: '', name: 'Arapaho'},
+  {code3: 'art', code2: '', name: 'Artificial languages'},
+  {code3: 'arw', code2: '', name: 'Arawak'},
+  {code3: 'asm', code2: 'as', name: 'Assamese'},
+  {code3: 'ast', code2: '', name: 'Asturian; Bable; Leonese; Asturleonese'},
+  {code3: 'ath', code2: '', name: 'Athapascan languages'},
+  {code3: 'aus', code2: '', name: 'Australian languages'},
+  {code3: 'ava', code2: 'av', name: 'Avaric'},
+  {code3: 'ave', code2: 'ae', name: 'Avestan'},
+  {code3: 'awa', code2: '', name: 'Awadhi'},
+  {code3: 'aym', code2: 'ay', name: 'Aymara'},
+  {code3: 'aze', code2: 'az', name: 'Azerbaijani'},
+  {code3: 'bad', code2: '', name: 'Banda languages'},
+  {code3: 'bai', code2: '', name: 'Bamileke languages'},
+  {code3: 'bak', code2: 'ba', name: 'Bashkir'},
+  {code3: 'bal', code2: '', name: 'Baluchi'},
+  {code3: 'bam', code2: 'bm', name: 'Bambara'},
+  {code3: 'ban', code2: '', name: 'Balinese'},
+  {code3: 'baq', code2: 'eu', name: 'Basque'},
+  {code3: 'bas', code2: '', name: 'Basa'},
+  {code3: 'bat', code2: '', name: 'Baltic languages'},
+  {code3: 'bej', code2: '', name: 'Beja; Bedawiyet'},
+  {code3: 'bel', code2: 'be', name: 'Belarusian'},
+  {code3: 'bem', code2: '', name: 'Bemba'},
+  {code3: 'ben', code2: 'bn', name: 'Bengali'},
+  {code3: 'ber', code2: '', name: 'Berber languages'},
+  {code3: 'bho', code2: '', name: 'Bhojpuri'},
+  {code3: 'bih', code2: 'bh', name: 'Bihari languages'},
+  {code3: 'bik', code2: '', name: 'Bikol'},
+  {code3: 'bin', code2: '', name: 'Bini; Edo'},
+  {code3: 'bis', code2: 'bi', name: 'Bislama'},
+  {code3: 'bla', code2: '', name: 'Siksika'},
+  {code3: 'bnt', code2: '', name: 'Bantu languages'},
+  {code3: 'bod', code2: 'bo', name: 'Tibetan'},
+  {code3: 'bos', code2: 'bs', name: 'Bosnian'},
+  {code3: 'bra', code2: '', name: 'Braj'},
+  {code3: 'bre', code2: 'br', name: 'Breton'},
+  {code3: 'btk', code2: '', name: 'Batak languages'},
+  {code3: 'bua', code2: '', name: 'Buriat'},
+  {code3: 'bug', code2: '', name: 'Buginese'},
+  {code3: 'bul', code2: 'bg', name: 'Bulgarian'},
+  {code3: 'bur', code2: 'my', name: 'Burmese'},
+  {code3: 'byn', code2: '', name: 'Blin; Bilin'},
+  {code3: 'cad', code2: '', name: 'Caddo'},
+  {code3: 'cai', code2: '', name: 'Central American Indian languages'},
+  {code3: 'car', code2: '', name: 'Galibi Carib'},
+  {code3: 'cat', code2: 'ca', name: 'Catalan; Valencian'},
+  {code3: 'cau', code2: '', name: 'Caucasian languages'},
+  {code3: 'ceb', code2: '', name: 'Cebuano'},
+  {code3: 'cel', code2: '', name: 'Celtic languages'},
+  {code3: 'ces', code2: 'cs', name: 'Czech'},
+  {code3: 'cha', code2: 'ch', name: 'Chamorro'},
+  {code3: 'chb', code2: '', name: 'Chibcha'},
+  {code3: 'che', code2: 'ce', name: 'Chechen'},
+  {code3: 'chg', code2: '', name: 'Chagatai'},
+  {code3: 'chi', code2: 'zh', name: 'Chinese'},
+  {code3: 'chk', code2: '', name: 'Chuukese'},
+  {code3: 'chm', code2: '', name: 'Mari'},
+  {code3: 'chn', code2: '', name: 'Chinook jargon'},
+  {code3: 'cho', code2: '', name: 'Choctaw'},
+  {code3: 'chp', code2: '', name: 'Chipewyan; Dene Suline'},
+  {code3: 'chr', code2: '', name: 'Cherokee'},
+  {
+    code3: 'chu',
+    code2: 'cu',
+    name: 'Church Slavic; Old Slavonic; Church Slavonic; Old Bulgarian; Old Church Slavonic',
+  },
+  {code3: 'chv', code2: 'cv', name: 'Chuvash'},
+  {code3: 'chy', code2: '', name: 'Cheyenne'},
+  {code3: 'cmc', code2: '', name: 'Chamic languages'},
+  {code3: 'cnr', code2: '', name: 'Montenegrin'},
+  {code3: 'cop', code2: '', name: 'Coptic'},
+  {code3: 'cor', code2: 'kw', name: 'Cornish'},
+  {code3: 'cos', code2: 'co', name: 'Corsican'},
+  {code3: 'cpe', code2: '', name: 'Creoles and pidgins, English based'},
+  {code3: 'cpf', code2: '', name: 'Creoles and pidgins, French-based'},
+  {code3: 'cpp', code2: '', name: 'Creoles and pidgins, Portuguese-based'},
+  {code3: 'cre', code2: 'cr', name: 'Cree'},
+  {code3: 'crh', code2: '', name: 'Crimean Tatar; Crimean Turkish'},
+  {code3: 'crp', code2: '', name: 'Creoles and pidgins'},
+  {code3: 'csb', code2: '', name: 'Kashubian'},
+  {code3: 'cus', code2: '', name: 'Cushitic languages'},
+  {code3: 'cym', code2: 'cy', name: 'Welsh'},
+  {code3: 'cze', code2: 'cs', name: 'Czech'},
+  {code3: 'dak', code2: '', name: 'Dakota'},
+  {code3: 'dan', code2: 'da', name: 'Danish'},
+  {code3: 'dar', code2: '', name: 'Dargwa'},
+  {code3: 'day', code2: '', name: 'Land Dayak languages'},
+  {code3: 'del', code2: '', name: 'Delaware'},
+  {code3: 'den', code2: '', name: 'Slave (Athapascan)'},
+  {code3: 'deu', code2: 'de', name: 'German'},
+  {code3: 'dgr', code2: '', name: 'Dogrib'},
+  {code3: 'din', code2: '', name: 'Dinka'},
+  {code3: 'div', code2: 'dv', name: 'Divehi; Dhivehi; Maldivian'},
+  {code3: 'doi', code2: '', name: 'Dogri'},
+  {code3: 'dra', code2: '', name: 'Dravidian languages'},
+  {code3: 'dsb', code2: '', name: 'Lower Sorbian'},
+  {code3: 'dua', code2: '', name: 'Duala'},
+  {code3: 'dum', code2: '', name: 'Dutch, Middle (ca.1050-1350)'},
+  {code3: 'dut', code2: 'nl', name: 'Dutch; Flemish'},
+  {code3: 'dyu', code2: '', name: 'Dyula'},
+  {code3: 'dzo', code2: 'dz', name: 'Dzongkha'},
+  {code3: 'efi', code2: '', name: 'Efik'},
+  {code3: 'egy', code2: '', name: 'Egyptian (Ancient)'},
+  {code3: 'eka', code2: '', name: 'Ekajuk'},
+  {code3: 'ell', code2: 'el', name: 'Greek, Modern (1453-)'},
+  {code3: 'elx', code2: '', name: 'Elamite'},
+  {code3: 'eng', code2: 'en', name: 'English'},
+  {code3: 'enm', code2: '', name: 'English, Middle (1100-1500)'},
+  {code3: 'epo', code2: 'eo', name: 'Esperanto'},
+  {code3: 'est', code2: 'et', name: 'Estonian'},
+  {code3: 'eus', code2: 'eu', name: 'Basque'},
+  {code3: 'ewe', code2: 'ee', name: 'Ewe'},
+  {code3: 'ewo', code2: '', name: 'Ewondo'},
+  {code3: 'fan', code2: '', name: 'Fang'},
+  {code3: 'fao', code2: 'fo', name: 'Faroese'},
+  {code3: 'fas', code2: 'fa', name: 'Persian'},
+  {code3: 'fat', code2: '', name: 'Fanti'},
+  {code3: 'fij', code2: 'fj', name: 'Fijian'},
+  {code3: 'fil', code2: '', name: 'Filipino; Pilipino'},
+  {code3: 'fin', code2: 'fi', name: 'Finnish'},
+  {code3: 'fiu', code2: '', name: 'Finno-Ugrian languages'},
+  {code3: 'fon', code2: '', name: 'Fon'},
+  {code3: 'fra', code2: 'fr', name: 'French'},
+  {code3: 'fre', code2: 'fr', name: 'French'},
+  {code3: 'frm', code2: '', name: 'French, Middle (ca.1400-1600)'},
+  {code3: 'fro', code2: '', name: 'French, Old (842-ca.1400)'},
+  {code3: 'frr', code2: '', name: 'Northern Frisian'},
+  {code3: 'frs', code2: '', name: 'Eastern Frisian'},
+  {code3: 'fry', code2: 'fy', name: 'Western Frisian'},
+  {code3: 'ful', code2: 'ff', name: 'Fulah'},
+  {code3: 'fur', code2: '', name: 'Friulian'},
+  {code3: 'gaa', code2: '', name: 'Ga'},
+  {code3: 'gay', code2: '', name: 'Gayo'},
+  {code3: 'gba', code2: '', name: 'Gbaya'},
+  {code3: 'gem', code2: '', name: 'Germanic languages'},
+  {code3: 'geo', code2: 'ka', name: 'Georgian'},
+  {code3: 'ger', code2: 'de', name: 'German'},
+  {code3: 'gez', code2: '', name: 'Geez'},
+  {code3: 'gil', code2: '', name: 'Gilbertese'},
+  {code3: 'gla', code2: 'gd', name: 'Gaelic; Scottish Gaelic'},
+  {code3: 'gle', code2: 'ga', name: 'Irish'},
+  {code3: 'glg', code2: 'gl', name: 'Galician'},
+  {code3: 'glv', code2: 'gv', name: 'Manx'},
+  {code3: 'gmh', code2: '', name: 'German, Middle High (ca.1050-1500)'},
+  {code3: 'goh', code2: '', name: 'German, Old High (ca.750-1050)'},
+  {code3: 'gon', code2: '', name: 'Gondi'},
+  {code3: 'gor', code2: '', name: 'Gorontalo'},
+  {code3: 'got', code2: '', name: 'Gothic'},
+  {code3: 'grb', code2: '', name: 'Grebo'},
+  {code3: 'grc', code2: '', name: 'Greek, Ancient (to 1453)'},
+  {code3: 'gre', code2: 'el', name: 'Greek, Modern (1453-)'},
+  {code3: 'grn', code2: 'gn', name: 'Guarani'},
+  {code3: 'gsw', code2: '', name: 'Swiss German; Alemannic; Alsatian'},
+  {code3: 'gujgu', code2: 'Gujarati', name: 'goudjrati'},
+  {code3: 'gwi', code2: '', name: "Gwich'in"},
+  {code3: 'hai', code2: '', name: 'Haida'},
+  {code3: 'hat', code2: 'ht', name: 'Haitian; Haitian Creole'},
+  {code3: 'hau', code2: 'ha', name: 'Hausa'},
+  {code3: 'haw', code2: '', name: 'Hawaiian'},
+  {code3: 'heb', code2: 'he', name: 'Hebrew'},
+  {code3: 'her', code2: 'hz', name: 'Herero'},
+  {code3: 'hil', code2: '', name: 'Hiligaynon'},
+  {
+    code3: 'him',
+    code2: '',
+    name: 'Himachali languages; Western Pahari languages',
+  },
+  {code3: 'hin', code2: 'hi', name: 'Hindi'},
+  {code3: 'hit', code2: '', name: 'Hittite'},
+  {code3: 'hmn', code2: '', name: 'Hmong; Mong'},
+  {code3: 'hmo', code2: 'ho', name: 'Hiri Motu'},
+  {code3: 'hrv', code2: 'hr', name: 'Croatian'},
+  {code3: 'hsb', code2: '', name: 'Upper Sorbian'},
+  {code3: 'hun', code2: 'hu', name: 'Hungarian'},
+  {code3: 'hup', code2: '', name: 'Hupa'},
+  {code3: 'hye', code2: 'hy', name: 'Armenian'},
+  {code3: 'iba', code2: '', name: 'Iban'},
+  {code3: 'ibo', code2: 'ig', name: 'Igbo'},
+  {code3: 'ice', code2: 'is', name: 'Icelandic'},
+  {code3: 'ido', code2: 'io', name: 'Ido'},
+  {code3: 'iii', code2: 'ii', name: 'Sichuan Yi; Nuosu'},
+  {code3: 'ijo', code2: '', name: 'Ijo languages'},
+  {code3: 'iku', code2: 'iu', name: 'Inuktitut'},
+  {code3: 'ile', code2: 'ie', name: 'Interlingue; Occidental'},
+  {code3: 'ilo', code2: '', name: 'Iloko'},
+  {
+    code3: 'ina',
+    code2: 'ia',
+    name: 'Interlingua (International Auxiliary Language Association)',
+  },
+  {code3: 'inc', code2: '', name: 'Indic languages'},
+  {code3: 'ind', code2: 'id', name: 'Indonesian'},
+  {code3: 'ine', code2: '', name: 'Indo-European languages'},
+  {code3: 'inh', code2: '', name: 'Ingush'},
+  {code3: 'ipk', code2: 'ik', name: 'Inupiaq'},
+  {code3: 'ira', code2: '', name: 'Iranian languages'},
+  {code3: 'iro', code2: '', name: 'Iroquoian languages'},
+  {code3: 'isl', code2: 'is', name: 'Icelandic'},
+  {code3: 'ita', code2: 'it', name: 'Italian'},
+  {code3: 'jav', code2: 'jv', name: 'Javanese'},
+  {code3: 'jbo', code2: '', name: 'Lojban'},
+  {code3: 'jpn', code2: 'ja', name: 'Japanese'},
+  {code3: 'jpr', code2: '', name: 'Judeo-Persian'},
+  {code3: 'jrb', code2: '', name: 'Judeo-Arabic'},
+  {code3: 'kaa', code2: '', name: 'Kara-Kalpak'},
+  {code3: 'kab', code2: '', name: 'Kabyle'},
+  {code3: 'kac', code2: '', name: 'Kachin; Jingpho'},
+  {code3: 'kal', code2: 'kl', name: 'Kalaallisut; Greenlandic'},
+  {code3: 'kam', code2: '', name: 'Kamba'},
+  {code3: 'kan', code2: 'kn', name: 'Kannada'},
+  {code3: 'kar', code2: '', name: 'Karen languages'},
+  {code3: 'kas', code2: 'ks', name: 'Kashmiri'},
+  {code3: 'kat', code2: 'ka', name: 'Georgian'},
+  {code3: 'kau', code2: 'kr', name: 'Kanuri'},
+  {code3: 'kaw', code2: '', name: 'Kawi'},
+  {code3: 'kaz', code2: 'kk', name: 'Kazakh'},
+  {code3: 'kbd', code2: '', name: 'Kabardian'},
+  {code3: 'kha', code2: '', name: 'Khasi'},
+  {code3: 'khi', code2: '', name: 'Khoisan languages'},
+  {code3: 'khm', code2: 'km', name: 'Central Khmer'},
+  {code3: 'kho', code2: '', name: 'Khotanese; Sakan'},
+  {code3: 'kik', code2: 'ki', name: 'Kikuyu; Gikuyu'},
+  {code3: 'kin', code2: 'rw', name: 'Kinyarwanda'},
+  {code3: 'kir', code2: 'ky', name: 'Kirghiz; Kyrgyz'},
+  {code3: 'kmb', code2: '', name: 'Kimbundu'},
+  {code3: 'kok', code2: '', name: 'Konkani'},
+  {code3: 'kom', code2: 'kv', name: 'Komi'},
+  {code3: 'kon', code2: 'kg', name: 'Kongo'},
+  {code3: 'kor', code2: 'ko', name: 'Korean'},
+  {code3: 'kos', code2: '', name: 'Kosraean'},
+  {code3: 'kpe', code2: '', name: 'Kpelle'},
+  {code3: 'krc', code2: '', name: 'Karachay-Balkar'},
+  {code3: 'krl', code2: '', name: 'Karelian'},
+  {code3: 'kro', code2: '', name: 'Kru languages'},
+  {code3: 'kru', code2: '', name: 'Kurukh'},
+  {code3: 'kua', code2: 'kj', name: 'Kuanyama; Kwanyama'},
+  {code3: 'kum', code2: '', name: 'Kumyk'},
+  {code3: 'kur', code2: 'ku', name: 'Kurdish'},
+  {code3: 'kut', code2: '', name: 'Kutenai'},
+  {code3: 'lad', code2: '', name: 'Ladino'},
+  {code3: 'lah', code2: '', name: 'Lahnda'},
+  {code3: 'lam', code2: '', name: 'Lamba'},
+  {code3: 'lao', code2: 'lo', name: 'Lao'},
+  {code3: 'lat', code2: 'la', name: 'Latin'},
+  {code3: 'lav', code2: 'lv', name: 'Latvian'},
+  {code3: 'lez', code2: '', name: 'Lezghian'},
+  {code3: 'lim', code2: 'li', name: 'Limburgan; Limburger; Limburgish'},
+  {code3: 'lin', code2: 'ln', name: 'Lingala'},
+  {code3: 'lit', code2: 'lt', name: 'Lithuanian'},
+  {code3: 'lol', code2: '', name: 'Mongo'},
+  {code3: 'loz', code2: '', name: 'Lozi'},
+  {code3: 'ltz', code2: 'lb', name: 'Luxembourgish; Letzeburgesch'},
+  {code3: 'lua', code2: '', name: 'Luba-Lulua'},
+  {code3: 'lub', code2: 'lu', name: 'Luba-Katanga'},
+  {code3: 'lug', code2: 'lg', name: 'Ganda'},
+  {code3: 'lui', code2: '', name: 'Luiseno'},
+  {code3: 'lun', code2: '', name: 'Lunda'},
+  {
+    code3: 'luo',
+    code2: ' Luo (Kenya and Tanzania)',
+    name: 'luo (Kenya et Tanzanie)',
+  },
+  {code3: 'lus', code2: '', name: 'Lushai'},
+  {code3: 'mac', code2: 'mk', name: 'Macedonian'},
+  {code3: 'mad', code2: '', name: 'Madurese'},
+  {code3: 'mag', code2: '', name: 'Magahi'},
+  {code3: 'mah', code2: 'mh', name: 'Marshallese'},
+  {code3: 'mai', code2: '', name: 'Maithili'},
+  {code3: 'mak', code2: '', name: 'Makasar'},
+  {code3: 'mal', code2: 'ml', name: 'Malayalam'},
+  {code3: 'man', code2: '', name: 'Mandingo'},
+  {code3: 'mao', code2: 'mi', name: 'Maori'},
+  {code3: 'map', code2: '', name: 'Austronesian languages'},
+  {code3: 'mar', code2: 'mr', name: 'Marathi'},
+  {code3: 'mas', code2: '', name: 'Masai'},
+  {code3: 'may', code2: 'ms', name: 'Malay'},
+  {code3: 'mdf', code2: '', name: 'Moksha'},
+  {code3: 'mdr', code2: '', name: 'Mandar'},
+  {code3: 'men', code2: '', name: 'Mende'},
+  {code3: 'mga', code2: '', name: 'Irish, Middle (900-1200)'},
+  {code3: 'mic', code2: '', name: "Mi'kmaq; Micmac"},
+  {code3: 'min', code2: '', name: 'Minangkabau'},
+  {code3: 'mis', code2: '', name: 'Uncoded languages'},
+  {code3: 'mkd', code2: 'mk', name: 'Macedonian'},
+  {code3: 'mkh', code2: '', name: 'Mon-Khmer languages'},
+  {code3: 'mlg', code2: 'mg', name: 'Malagasy'},
+  {code3: 'mlt', code2: 'mt', name: 'Maltese'},
+  {code3: 'mnc', code2: '', name: 'Manchu'},
+  {code3: 'mni', code2: '', name: 'Manipuri'},
+  {code3: 'mno', code2: '', name: 'Manobo languages'},
+  {code3: 'moh', code2: '', name: 'Mohawk'},
+  {code3: 'mon', code2: 'mn', name: 'Mongolian'},
+  {code3: 'mos', code2: '', name: 'Mossi'},
+  {code3: 'mri', code2: 'mi', name: 'Maori'},
+  {code3: 'msa', code2: 'ms', name: 'Malay'},
+  {code3: 'mul', code2: '', name: 'Multiple languages'},
+  {code3: 'mun', code2: '', name: 'Munda languages'},
+  {code3: 'mus', code2: '', name: 'Creek'},
+  {code3: 'mwl', code2: '', name: 'Mirandese'},
+  {code3: 'mwr', code2: '', name: 'Marwari'},
+  {code3: 'mya', code2: 'my', name: 'Burmese'},
+  {code3: 'myn', code2: '', name: 'Mayan languages'},
+  {code3: 'myv', code2: '', name: 'Erzya'},
+  {code3: 'nah', code2: '', name: 'Nahuatl languages'},
+  {code3: 'nai', code2: '', name: 'North American Indian languages'},
+  {code3: 'nap', code2: '', name: 'Neapolitan'},
+  {code3: 'nau', code2: 'na', name: 'Nauru'},
+  {code3: 'nav', code2: 'nv', name: 'Navajo; Navaho'},
+  {code3: 'nbl', code2: 'nr', name: 'Ndebele, South; South Ndebele'},
+  {code3: 'nde', code2: 'nd', name: 'Ndebele, North; North Ndebele'},
+  {code3: 'ndo', code2: 'ng', name: 'Ndonga'},
+  {
+    code3: 'nds',
+    code2: '',
+    name: 'Low German; Low Saxon; German, Low; Saxon, Low',
+  },
+  {code3: 'nep', code2: 'ne', name: 'Nepali'},
+  {code3: 'new', code2: '', name: 'Nepal Bhasa; Newari'},
+  {code3: 'nia', code2: '', name: 'Nias'},
+  {code3: 'nic', code2: '', name: 'Niger-Kordofanian languages'},
+  {code3: 'niu', code2: '', name: 'Niuean'},
+  {code3: 'nld', code2: 'nl', name: 'Dutch; Flemish'},
+  {code3: 'nno', code2: 'nn', name: 'Norwegian Nynorsk; Nynorsk, Norwegian'},
+  {code3: 'nob', code2: 'nb', name: 'Bokmål, Norwegian; Norwegian Bokmål'},
+  {code3: 'nog', code2: '', name: 'Nogai'},
+  {code3: 'non', code2: '', name: 'Norse, Old'},
+  {code3: 'nor', code2: 'no', name: 'Norwegian'},
+  {code3: 'nqo', code2: '', name: "N'Ko"},
+  {code3: 'nso', code2: '', name: 'Pedi; Sepedi; Northern Sotho'},
+  {code3: 'nub', code2: '', name: 'Nubian languages'},
+  {
+    code3: 'nwc',
+    code2: '',
+    name: 'Classical Newari; Old Newari; Classical Nepal Bhasa',
+  },
+  {code3: 'nya', code2: 'ny', name: 'Chichewa; Chewa; Nyanja'},
+  {code3: 'nym', code2: '', name: 'Nyamwezi'},
+  {code3: 'nyn', code2: '', name: 'Nyankole'},
+  {code3: 'nyo', code2: '', name: 'Nyoro'},
+  {code3: 'nzi', code2: '', name: 'Nzima'},
+  {code3: 'oci', code2: 'oc', name: 'Occitan (post 1500)'},
+  {code3: 'oji', code2: 'oj', name: 'Ojibwa'},
+  {code3: 'ori', code2: 'or', name: 'Oriya'},
+  {code3: 'orm', code2: 'om', name: 'Oromo'},
+  {code3: 'osa', code2: '', name: 'Osage'},
+  {code3: 'oss', code2: 'os', name: 'Ossetian; Ossetic'},
+  {code3: 'ota', code2: '', name: 'Turkish, Ottoman (1500-1928)'},
+  {code3: 'oto', code2: '', name: 'Otomian languages'},
+  {code3: 'paa', code2: '', name: 'Papuan languages'},
+  {code3: 'pag', code2: '', name: 'Pangasinan'},
+  {code3: 'pal', code2: ' ', name: 'Pahlavi'},
+  {code3: 'pam', code2: ' ', name: 'Pampanga; Kapampangan'},
+  {code3: 'pan', code2: 'paPanjabi; Punjabi', name: 'pendjabi'},
+  {code3: 'pap', code2: ' ', name: 'Papiamento'},
+  {code3: 'pau', code2: ' ', name: 'Palauan'},
+  {code3: 'peo', code2: ' ', name: 'Persian, Old (ca.600-400 B.C.)'},
+  {code3: 'per', code2: 'fa', name: 'Persian'},
+  {code3: 'phi', code2: ' ', name: 'Philippine languages'},
+  {code3: 'phn', code2: ' ', name: 'Phoenician'},
+  {code3: 'pli', code2: 'pi', name: 'Pali'},
+  {code3: 'pol', code2: 'pl', name: 'Polish'},
+  {code3: 'pon', code2: ' ', name: 'Pohnpeian'},
+  {code3: 'por', code2: 'pt', name: 'Portuguese'},
+  {code3: 'pra', code2: ' ', name: 'Prakrit languages'},
+  {
+    code3: 'pro',
+    code2: ' ',
+    name: 'Provençal, Old (to 1500);Occitan, Old (to 1500)',
+  },
+  {code3: 'pus', code2: 'ps', name: 'Pushto; Pashto'},
+  {code3: 'que', code2: 'qu', name: 'Quechua'},
+  {code3: 'raj', code2: ' ', name: 'Rajasthani'},
+  {code3: 'rap', code2: ' ', name: 'Rapanui'},
+  {code3: 'rar', code2: ' ', name: 'Rarotongan; Cook Islands Maori'},
+  {code3: 'roa', code2: ' ', name: 'Romance languages'},
+  {code3: 'roh', code2: 'rm', name: 'Romansh'},
+  {code3: 'rom', code2: ' ', name: 'Romany'},
+  {code3: 'rum', code2: 'ro', name: 'Romanian; Moldavian; Moldovan'},
+  {code3: 'ron', code2: 'ro', name: 'Romanian; Moldavian; Moldovan'},
+  {code3: 'run', code2: 'rn', name: 'Rundi'},
+  {code3: 'rup', code2: ' ', name: 'Aromanian; Arumanian; Macedo-Romanian'},
+  {code3: 'rus', code2: 'ru', name: 'Russian'},
+  {code3: 'sad', code2: ' ', name: 'Sandawe'},
+  {code3: 'sag', code2: 'sg', name: 'Sango'},
+  {code3: 'sah', code2: ' ', name: 'Yakut'},
+  {code3: 'sai', code2: ' ', name: 'South American Indian languages'},
+  {code3: 'sal', code2: ' ', name: 'Salishan languages'},
+  {code3: 'sam', code2: ' ', name: 'Samaritan Aramaic'},
+  {code3: 'san', code2: 'sa', name: 'Sanskrit'},
+  {code3: 'sas', code2: ' ', name: 'Sasak'},
+  {code3: 'sat', code2: ' ', name: 'Santali'},
+  {code3: 'scn', code2: ' ', name: 'Sicilian'},
+  {code3: 'sco', code2: ' ', name: 'Scots'},
+  {code3: 'sel', code2: ' ', name: 'Selkup'},
+  {code3: 'sem', code2: ' ', name: 'Semitic languages'},
+  {code3: 'sga', code2: ' ', name: 'Irish, Old (to 900)'},
+  {code3: 'sgn', code2: ' ', name: 'Sign Languages'},
+  {code3: 'shn', code2: ' ', name: 'Shan'},
+  {code3: 'sid', code2: ' ', name: 'Sidamo'},
+  {code3: 'sin', code2: 'si', name: 'Sinhala; Sinhalese'},
+  {code3: 'sio', code2: ' ', name: 'Siouan languages'},
+  {code3: 'sit', code2: ' ', name: 'Sino-Tibetan languages'},
+  {code3: 'sla', code2: ' ', name: 'Slavic languages'},
+  {code3: 'slo', code2: 'sk', name: 'Slovak'},
+  {code3: 'slk', code2: 'sk', name: 'Slovak'},
+  {code3: 'slv', code2: 'sl', name: 'Slovenian'},
+  {code3: 'sma', code2: ' ', name: 'Southern Sami'},
+  {code3: 'sme', code2: 'se', name: 'Northern Sami'},
+  {code3: 'smi', code2: ' ', name: 'Sami languages'},
+  {code3: 'smj', code2: ' ', name: 'Lule Sami'},
+  {code3: 'smn', code2: ' ', name: 'Inari Sami'},
+  {code3: 'smo', code2: 'sm', name: 'Samoan'},
+  {code3: 'sms', code2: ' ', name: 'Skolt Sami'},
+  {code3: 'sna', code2: 'sn', name: 'Shona'},
+  {code3: 'snd', code2: 'sd', name: 'Sindhi'},
+  {code3: 'snk', code2: ' ', name: 'Soninke'},
+  {code3: 'sog', code2: ' ', name: 'Sogdian'},
+  {code3: 'som', code2: 'so', name: 'Somali'},
+  {code3: 'son', code2: ' ', name: 'Songhai languages'},
+  {code3: 'sot', code2: 'st', name: 'Sotho, Southern'},
+  {code3: 'spa', code2: 'es', name: 'Spanish; Castilian'},
+  {code3: 'sqi', code2: 'sq', name: 'Albanian'},
+  {code3: 'srd', code2: 'sc', name: 'Sardinian'},
+  {code3: 'srn', code2: ' ', name: 'Sranan Tongo'},
+  {code3: 'srp', code2: 'sr', name: 'Serbian'},
+  {code3: 'srr', code2: ' ', name: 'Serer'},
+  {code3: 'ssa', code2: ' ', name: 'Nilo-Saharan languages'},
+  {code3: 'ssw', code2: 'ss', name: 'Swati'},
+  {code3: 'suk', code2: ' ', name: 'Sukuma'},
+  {code3: 'sun', code2: 'su', name: 'Sundanese'},
+  {code3: 'sus', code2: ' ', name: 'Susu'},
+  {code3: 'sux', code2: ' ', name: 'Sumerian'},
+  {code3: 'swa', code2: 'sw', name: 'Swahili'},
+  {code3: 'swe', code2: 'sv', name: 'Swedish'},
+  {code3: 'syc', code2: ' ', name: 'Classical Syriac'},
+  {code3: 'syr', code2: ' ', name: 'Syriac'},
+  {code3: 'tah', code2: 'ty', name: 'Tahitian'},
+  {code3: 'tai', code2: ' ', name: 'Tai languages'},
+  {code3: 'tam', code2: 'ta', name: 'Tamil'},
+  {code3: 'tat', code2: 'tt', name: 'Tatar'},
+  {code3: 'tel', code2: 'te', name: 'Telugu'},
+  {code3: 'tem', code2: ' ', name: 'Timne'},
+  {code3: 'ter', code2: ' ', name: 'Tereno'},
+  {code3: 'tet', code2: ' ', name: 'Tetum'},
+  {code3: 'tgk', code2: 'tg', name: 'Tajik'},
+  {code3: 'tgl', code2: 'tl', name: 'Tagalog'},
+  {code3: 'tha', code2: 'th', name: 'Thai'},
+  {code3: 'tib', code2: 'bo', name: 'Tibetan'},
+  {code3: 'tig', code2: ' ', name: 'Tigre'},
+  {code3: 'tir', code2: 'ti', name: 'Tigrinya'},
+  {code3: 'tiv', code2: ' ', name: 'Tiv'},
+  {code3: 'tkl', code2: ' ', name: 'Tokelau'},
+  {code3: 'tlh', code2: ' ', name: 'Klingon; tlhIngan-Hol'},
+  {code3: 'tli', code2: ' ', name: 'Tlingit'},
+  {code3: 'tmh', code2: ' ', name: 'Tamashek'},
+  {code3: 'tog', code2: ' ', name: 'Tonga (Nyasa)'},
+  {code3: 'ton', code2: 'to', name: 'Tonga (Tonga Islands)'},
+  {code3: 'tpi', code2: ' ', name: 'Tok Pisin'},
+  {code3: 'tsi', code2: ' ', name: 'Tsimshian'},
+  {code3: 'tsn', code2: 'tn', name: 'Tswana'},
+  {code3: 'tso', code2: 'ts', name: 'Tsonga'},
+  {code3: 'tuk', code2: 'tk', name: 'Turkmen'},
+  {code3: 'tum', code2: ' ', name: 'Tumbuka'},
+  {code3: 'tup', code2: ' ', name: 'Tupi languages'},
+  {code3: 'tur', code2: 'tr', name: 'Turkish'},
+  {code3: 'tut', code2: ' ', name: 'Altaic languages'},
+  {code3: 'tvl', code2: ' ', name: 'Tuvalu'},
+  {code3: 'twi', code2: 'tw', name: 'Twi'},
+  {code3: 'tyv', code2: ' ', name: 'Tuvinian'},
+  {code3: 'udm', code2: ' ', name: 'Udmurt'},
+  {code3: 'uga', code2: ' ', name: 'Ugaritic'},
+  {code3: 'uig', code2: 'ug', name: 'Uighur; Uyghur'},
+  {code3: 'ukr', code2: 'uk', name: 'Ukrainian'},
+  {code3: 'umb', code2: ' ', name: 'Umbundu'},
+  {code3: 'und', code2: ' ', name: 'Undetermined'},
+  {code3: 'urd', code2: 'ur', name: 'Urdu'},
+  {code3: 'uzb', code2: 'uz', name: 'Uzbek'},
+  {code3: 'vai', code2: ' ', name: 'Vai'},
+  {code3: 'ven', code2: 've', name: 'Venda'},
+  {code3: 'vie', code2: 'vi', name: 'Vietnamese'},
+  {code3: 'vol', code2: 'vo', name: 'Volapük'},
+  {code3: 'vot', code2: ' ', name: 'Votic'},
+  {code3: 'wak', code2: ' ', name: 'Wakashan languages'},
+  {code3: 'wal', code2: ' ', name: 'Wolaitta; Wolaytta'},
+  {code3: 'war', code2: ' ', name: 'Waray'},
+  {code3: 'was', code2: ' ', name: 'Washo'},
+  {code3: 'wel', code2: 'cy', name: 'Welsh'},
+  {code3: 'wen', code2: ' ', name: 'Sorbian languages'},
+  {code3: 'wln', code2: 'wa', name: 'Walloon'},
+  {code3: 'wol', code2: 'wo', name: 'Wolof'},
+  {code3: 'xal', code2: ' ', name: 'Kalmyk; Oirat'},
+  {code3: 'xho', code2: 'xh', name: 'Xhosa'},
+  {code3: 'yao', code2: ' ', name: 'Yao'},
+  {code3: 'yap', code2: ' ', name: 'Yapese'},
+  {code3: 'yid', code2: 'yi', name: 'Yiddish'},
+  {code3: 'yor', code2: 'yo', name: 'Yoruba'},
+  {code3: 'ypk', code2: ' ', name: 'Yupik languages'},
+  {code3: 'zap', code2: ' ', name: 'Zapotec'},
+  {code3: 'zbl', code2: ' ', name: 'Blissymbols; Blissymbolics; Bliss'},
+  {code3: 'zen', code2: ' ', name: 'Zenaga'},
+  {code3: 'zgh', code2: ' ', name: 'Standard Moroccan Tamazight'},
+  {code3: 'zha', code2: 'za', name: 'Zhuang; Chuang'},
+  {code3: 'zho', code2: 'zh', name: 'Chinese'},
+  {code3: 'znd', code2: ' ', name: 'Zande languages'},
+  {code3: 'zul', code2: 'zu', name: 'Zulu'},
+  {code3: 'zun', code2: ' ', name: 'Zuni'},
+  {
+    code3: 'zza',
+    code2: '',
+    name: 'Zaza; Dimili; Dimli; Kirdki; Kirmanjki; Zazaki',
+  },
+]
+
+export const LANGUAGES_MAP_CODE2 = Object.fromEntries(
+  LANGUAGES.map(lang => [lang.code2, lang]),
+)
+
+export const LANGUAGES_MAP_CODE3 = Object.fromEntries(
+  LANGUAGES.map(lang => [lang.code3, lang]),
+)

src/state/models/feed-view.ts

@@ -341,7 +341,9 @@ export class FeedModel {
       return [
         FeedTuner.dedupReposts,
         FeedTuner.likedRepliesOnly,
-        FeedTuner.englishOnly,
+        FeedTuner.preferredLangOnly(
+          this.rootStore.preferences.contentLanguages,
+        ),
       ]
     }
     if (this.feedType === 'home') {

src/state/models/root-store.ts

@@ -16,6 +16,7 @@ import {ProfilesViewModel} from './profiles-view'
 import {LinkMetasCache} from './cache/link-metas'
 import {NotificationsViewItemModel} from './notifications-view'
 import {MeModel} from './me'
+import {PreferencesModel} from './ui/preferences'
 import {resetToTab} from '../../Navigation'
 import {ImageSizesCache} from './cache/image-sizes'
 
@@ -33,6 +34,7 @@ export class RootStoreModel {
   log = new LogModel()
   session = new SessionModel(this)
   shell = new ShellUiModel(this)
+  preferences = new PreferencesModel()
   me = new MeModel(this)
   profiles = new ProfilesViewModel(this)
   linkMetas = new LinkMetasCache(this)
@@ -83,6 +85,7 @@ export class RootStoreModel {
       session: this.session.serialize(),
       me: this.me.serialize(),
       shell: this.shell.serialize(),
+      preferences: this.preferences.serialize(),
     }
   }
 
@@ -103,6 +106,9 @@ export class RootStoreModel {
       if (hasProp(v, 'shell')) {
         this.shell.hydrate(v.shell)
       }
+      if (hasProp(v, 'preferences')) {
+        this.preferences.hydrate(v.preferences)
+      }
     }
   }
 

src/state/models/ui/preferences.ts

@@ -0,0 +1,39 @@
+import {makeAutoObservable} from 'mobx'
+import {getLocales} from 'expo-localization'
+import {isObj, hasProp} from 'lib/type-guards'
+
+const deviceLocales = getLocales()
+
+export class PreferencesModel {
+  _contentLanguages: string[] | undefined
+
+  constructor() {
+    makeAutoObservable(this, {}, {autoBind: true})
+  }
+
+  // gives an array of BCP 47 language tags without region codes
+  get contentLanguages() {
+    if (this._contentLanguages) {
+      return this._contentLanguages
+    }
+    return deviceLocales.map(locale => locale.languageCode)
+  }
+
+  serialize() {
+    return {
+      contentLanguages: this._contentLanguages,
+    }
+  }
+
+  hydrate(v: unknown) {
+    if (isObj(v)) {
+      if (
+        hasProp(v, 'contentLanguages') &&
+        Array.isArray(v.contentLanguages) &&
+        typeof v.contentLanguages.every(item => typeof item === 'string')
+      ) {
+        this._contentLanguages = v.contentLanguages
+      }
+    }
+  }
+}

yarn.lock

@@ -7345,6 +7345,13 @@ expo-keep-awake@~12.0.1:
   resolved "https://registry.yarnpkg.com/expo-keep-awake/-/expo-keep-awake-12.0.1.tgz#19c5ab55391394ded3f6c262b0707c7140658a11"
   integrity sha512-hqeCnb4033TyuZaXs93zTK7rjVJ3bywXATyMmKmKkLEsH2PKBAl/VmjlCOPQL/2Ncqz6aj7Wo//tjeJTARBD4g==
 
+expo-localization@~14.1.1:
+  version "14.1.1"
+  resolved "https://registry.yarnpkg.com/expo-localization/-/expo-localization-14.1.1.tgz#7733ca7da9e13d242cb8b395ddff23a4d2c84adf"
+  integrity sha512-wmozyF82i6muCBWTX+atzqQv9JUjSbEQ0QKYg1Th4QX/qcVd+ajVjFUytSMzg/ME1vGUP1s+LN+SiZ98YokWWw==
+  dependencies:
+    rtl-detect "^1.0.2"
+
 expo-manifests@~0.5.0:
   version "0.5.2"
   resolved "https://registry.yarnpkg.com/expo-manifests/-/expo-manifests-0.5.2.tgz#60f91ad196cd5a37248c28c6f307df806c5a27ad"
@@ -14395,6 +14402,11 @@ rope-sequence@^1.3.0:
   resolved "https://registry.yarnpkg.com/rope-sequence/-/rope-sequence-1.3.3.tgz#3f67fc106288b84b71532b4a5fd9d4881e4457f0"
   integrity sha512-85aZYCxweiD5J8yTEbw+E6A27zSnLPNDL0WfPdw3YYodq7WjnTKo0q4dtyQ2gz23iPT8Q9CUyJtAaUNcTxRf5Q==
 
+rtl-detect@^1.0.2:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/rtl-detect/-/rtl-detect-1.0.4.tgz#40ae0ea7302a150b96bc75af7d749607392ecac6"
+  integrity sha512-EBR4I2VDSSYr7PkBmFy04uhycIpDKp+21p/jARYXlCSjQksTBQcJ0HFUPOO79EPPH5JS6VAhiIQbycf0O3JAxQ==
+
 run-parallel@^1.1.9:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/run-parallel/-/run-parallel-1.2.0.tgz#66d1368da7bdf921eb9d95bd1a9229e7f21a43ee"