You may try to evaluate spell checking functionality for a chosen additional language on the additional languages demo page. Here is a list of all available and supported languages with their short codes. Russian with the strict letter Yo (Ё | ё). It means that words containing the letter Yo will be used strictly with this letter (e.g. ёжик and not ежик). NEW | 5.10.0Language Spelling Grammar Country Short code Localization Number of words Comments 1 Auto Detect auto Auto-detect defines a language and sets a correct language for further check. 2 AI-based English + + en_AI The beta version: general English. 3 AI-based German + + de_AI The beta version 4 Af-Soomaali + Somali so_SO 5 Afrikaans + South Africa af_ZA 6 Akan + The Republic of Ghana ak_GH 7 Albanian + Albania sq_AL 8 American English + + United States en_US en-us 142,375 9 Amharic + Ethiopia am_ET 10 Ancient Greek + Greek grc_GR 11 Arabic + + ar_SA NEW | 5.5.9 12 Aragonese + Spain an_ES 13 Argentinian Spanish + + Argentina es_AR 14 Armenian + Armenia hy_AM 15 Assamese + India as_IN 16 Asturian + Spain ast_ES 17 Australian English + + Australia en_AU 18 Austrian German + + Austria de_AT 19 Azerbaijani or Azeri (Latin alphabet) + Azerbaijan az_AZ 19,131 20 Belarusian + Belarus be_BY 21 Bengali + India bn_IN 22 Bolivian Spanish + + Bolivia es_BO 23 Bosnian + Bosnia and Herzegovina bs_BA 24 Brazilian Portuguese + + Brazil pt_BR pt-br 10,394,016 25 Breton + France br_FR 26 British English + + The United Kingdom en_GB en-gb 145,296 27 Bulgarian + Bulgaria bg_BG 28 Canadian English + + Canada en_CA en-ca 121,966 29 Canadian French + + Canada fr_CA fr-ca 136,870 30 Catalan + + Spain ca_ES 31 Chichewa + South Central Africa (Zambia, Malawi) ny_MW 32 Chilean Spanish + + Chile es_CL 33 Chuvash + Russia cv_RU 34 Colombian Spanish + + Columbia es_CO 35 Costa Rican Spanish + + Costa Rica es_CR 36 Croatian + Croatia hr_HR 37 Cuban Spanish + + Cuba es_CU 38 Czech + Czech Republic cs_CZ 39 Danish + Denmark da_DK da 311,122 40 Dominican Spanish + + Dominican Republic es_DO 41 Dutch + + The Netherlands nl_NL nl 425,411 42 Ecuadorian Quechua + Ecuador qu_EC 43 Ecuadorian Spanish + + Ecuador es_EC 44 Estonian (Eesti keel) + Estonia et_EE 45 Esperanto + International auxiliary language eo_EO 46 Euskara or Basque + Spain eu_ES 47 Faroese + Faroe Islands fo_FO 48 Fijian + Fiji fj_FJ 49 Finland Swedish + Finland sv_FI 50 Finnish + Finland fi_FI fi 251,467 51 French + + France fr_FR fr 423,869 52 Frisian + Netherlands fy_NL 53 Friulian + Italy fu_IT 54 Galician + Spain gl_ES 55 Gascon + France gsc_FR 56 Georgian + Georgia ka_GE 57 German + + Germany de_DE de 2,301,750 58 Greek + + Greece, Cyprus el_GR el 575,120 59 Guatemalan Spanish + + Guatemala es_GT 60 Gujarati + India gu_IN 61 Haitian Creole + Haiti ht_HT 62 Hausa + Nigeria ha_GH 63 Hawaiian + United States (The State of Hawaii) haw_US 64 Hebrew + Israel he_HE 65 Hiligaynon + Philippines hl_PH 66 Hindi + India hi_IN 67 Honduran Spanish + + Honduras es_HN 68 Hungarian + Hungary hu_HU 69 Icelandic + Iceland is_IS 70 Indonesian + Indonesia id_ID 71 Interlingua International auxiliary language ia_XR DEPRECATED | 5.0.0 72 Irish + Ireland ga_IE 73 Italian + + Italy it_IT it 2,904,302 74 Japanese - + Japan ja_JP NEW | 5.5.6 75 Kannada + India kn_IN 76 Kashubian + Poland csb_PL 77 Kazakh + Kazakhstan kk_KZ 78 Kenya Swahili + Kenya sw_KE 79 Kinyarwanda + Rwanda rw_RW 80 Korean + South Korea ko_KR 81 Kurdish + Turkey ku_TR 82 Kyrgyz + Kyrgyzstan ky_KG 83 Latin + la_VA, la_LA 84 Latvian + Latvia lv_LV 85 Lingala + Dem. Rep. of Congo ln_CD 86 Lithuanian + Lithuania lt_LT 87 Lower Sorbian + Germany dsb_DE 88 Lowlands Saxon + Germany nd_DE 89 Luganda + Uganda lg_UG 90 Lule Sami + Norway, Sweden smj_NO 91 Luxembourgish + Luxembourg lb_LU 92 Macedonian + Macedonia mk_MK 93 Maithili + Nepal, India ma_IN 94 Malagasy + Malagasy mg_MG 95 Malay + Malaysia ms_MY 96 Malayalam + India ml_IN 97 Maltese + Malta mt_MT 98 Manx Isle of Man gv_GB DEPRECATED | 5.0.0 99 Maori + New Zealand mi_NZ 100 Marathi + India mr_IN 101 Mexican Spanish + Mexico es_MX 102 Moldovan + Republic of Moldova ro_MO 103 Mongolian + Mongolia mn_MN 104 Mossi + Burkina Faso mo_BF 105 Nepali + Nepal ne_NP 106 New Zealand English + + New Zealand en_NZ 107 Nicaraguan Spanish + + Nicaragua es_NI 108 Northern Sami + Norway se_NO 109 Northern Sotho + South Africa ns_ZA 110 Norwegian Bokmal + Norway nb_NO nb 888,428 111 Norwegian Nynorsk + Norway nn_NO 112 Occitan + France oc_FR 113 Odia + India or_IN 114 Oromo + Ethiopia om_ET 115 Panamanian Spanish + + Panama es_PA 116 Panjabi + India, Pakistan pa_IN 117 Paraguayan Spanish + + Paraguay es_PY 118 Persian + Iran fa_IR 119 Peruvian Spanish + + Peru es_PE 120 Polish + + Poland pl_PL 121 Portuguese + + Portugal pt_PT pt 993,633 122 Puerto Rican Spanish + + Puerto Rico es_PR 123 Quechua + Bolivia qu_BO 124 Romanian + Romania ro_RO 125 Russian + + Russia ru_RU 126 Russian (strict letter 'Yo') + + Russia ry_RU ru 127 Salvadoran Spanish + + El Salvador es_SV 128 Sanskrit + India sa_IN 129 Sardinian + Italy sc_IT 130 Scottish + Gaelic Scotland gd_GB 131 Serbian (Cyrillic alphabet) + Serbia sr_CY 132 Serbo-Croatian (Gaj's Latin alphabet) + Serbia, Croatia, Bosnia and Herzegovina, Montenegro sr_LT 133 Shona + Zimbabwe sn_ZW 134 Shuswap + Canada shs_CA 135 Simplified Chinese + Mainland China, Singapore zh_CN 136 Sinhalese + Sri Lanka si_LK 137 Slovak + + Slovakia sk_SK 138 Slovenian + + Slovenia sl_SL 139 South African English + South Africa en_ZA 140 Southern Ndebele + South Africa nr_ZA 141 Southern Sami + Norway, Sweden se_SE 142 Southern Sotho + South Africa st_ZA 143 Spanish + + Spain es_ES es 3,207,402 144 Swazi + South Africa ss_ZA 145 Swedish + + Sweden, Finland sv_SE sv 861,730 146 Swiss German + + Switzerland de_CH 147 Tagalog + Philippines tl_PH 148 Tajik + Tajikistan tg_TG 149 Tamil + India ta_IN 150 Tanzanian Swahili + Tanzania sw_TZ 151 Tatar + Tatarstan tt_RU 152 Telugu + India te_IN 153 Tetum + Indonesia tet_ID 154 Tigrinya + Ethiopia ti_ER 155 Tok Pisin + Papua New Guinea tpi_PG 156 Tsonga + South Africa ts_ZA 157 Tswana + Botswana tn_ZA 158 Turkish + Turkey tr_TR 159 Turkmen + Turkmenistan tk_TM 160 Ukrainian + + Ukraine uk_UA uk 2,597,806 161 Upper Sorbian + Germany hsb_DE 162 Urdu + Pakistan ur_PK 163 Uruguayan Spanish + + Uruguay es_UY 164 Uzbek (Cyrillic alphabet) + Uzbekistan uz_UZ 165 Uzbek (Latin alphabet) + Uzbekistan uz_LT 110,214 NEW | 5.0.0 166 Valencian + Spain cat_ES 167 Venda + South Africa ve_ZA 168 Venezuelan Spanish + + Venezuela es_VE 169 Vietnamese + Vietnam vi_VN 170 Walloon + Belgium wa_BE 171 Welsh + Wales cy_GB 172 Xhosa + South Africa xh_ZA 173 Yiddish + yi_YI 174 Zulu + South Africa zu_ZA