You may try to evaluate spell & grammar checking functionality for a chosen language on the supported languages demo page. Here is a list of all available and supported languages with their short codes. NEW | 5.5.6 Due to specifics of text input in Japanese language, there is no traditional spell check. Japanese people usualy type the latin characters for the phonetic spelling of the word, and the computer offers them the possible Japanese terms. Some references: 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. No dialects support. 3 AI-based German + ++ de_AI The beta version 4 AI-based Spanish + + es_AI The beta version. Available starting from v5.15.3. 5 Af-Soomaali + Somali so_SO 6 Afrikaans + South Africa af_ZA 7 Akan + The Republic of Ghana ak_GH 8 Albanian + Albania sq_AL 9 American English + ++ United States en_US en-us 142,375 10 Amharic + Ethiopia am_ET 11 Ancient Greek + Greek grc_GR 12 Arabic + ++ ar_SA NEW | 5.5.9 13 Aragonese + Spain an_ES 14 Argentinian Spanish + + Argentina es_AR 15 Armenian + Armenia hy_AM 16 Assamese + India as_IN 17 Asturian + Spain ast_ES 18 Australian English + ++ Australia en_AU 19 Austrian German + ++ Austria de_AT 20 Azerbaijani or Azeri (Latin alphabet) + Azerbaijan az_AZ 19,131 21 Belarusian + Belarus be_BY 22 Bengali + India bn_IN 23 Bolivian Spanish + + Bolivia es_BO 24 Bosnian + Bosnia and Herzegovina bs_BA 25 Brazilian Portuguese + ++ Brazil pt_BR pt-br 10,394,016 26 Breton + France br_FR 27 British English + ++ The United Kingdom en_GB en-gb 145,296 28 Bulgarian + Bulgaria bg_BG 29 Canadian English + ++ Canada en_CA en-ca 121,966 30 Canadian French + ++ Canada fr_CA fr-ca 136,870 31 Catalan + ++ Spain ca_ES 32 Chichewa + South Central Africa (Zambia, Malawi) ny_MW 33 Chilean Spanish + + Chile es_CL 34 Chuvash + Russia cv_RU 35 Colombian Spanish + + Columbia es_CO 36 Costa Rican Spanish + + Costa Rica es_CR 37 Croatian + Croatia hr_HR 38 Cuban Spanish + + Cuba es_CU 39 Czech + Czech Republic cs_CZ 40 Danish + ++ Denmark da_DK da 311,122 41 Dominican Spanish + + Dominican Republic es_DO 42 Dutch + ++ The Netherlands nl_NL nl 425,411 43 Ecuadorian Quechua + Ecuador qu_EC 44 Ecuadorian Spanish + + Ecuador es_EC 45 Estonian (Eesti keel) + Estonia et_EE 46 Esperanto + International auxiliary language eo_EO 47 Euskara or Basque + Spain eu_ES 48 Faroese + Faroe Islands fo_FO 49 Fijian + Fiji fj_FJ 50 Finland Swedish + Finland sv_FI 51 Finnish + Finland fi_FI fi 251,467 52 French + ++ France fr_FR fr 423,869 53 Frisian + Netherlands fy_NL 54 Friulian + Italy fu_IT 55 Galician + Spain gl_ES 56 Gascon + France gsc_FR 57 Georgian + Georgia ka_GE 58 German + ++ Germany de_DE de 2,301,750 59 Greek + ++ Greece, Cyprus el_GR el 575,120 60 Guatemalan Spanish + + Guatemala es_GT 61 Gujarati + India gu_IN 62 Haitian Creole + Haiti ht_HT 63 Hausa + Nigeria ha_GH 64 Hawaiian + United States (The State of Hawaii) haw_US 65 Hebrew + Israel he_HE 66 Hiligaynon + Philippines hl_PH 67 Hindi + India hi_IN 68 Honduran Spanish + + Honduras es_HN 69 Hungarian + Hungary hu_HU 70 Icelandic + Iceland is_IS 71 Indonesian + Indonesia id_ID 72 Interlingua International auxiliary language ia_XR DEPRECATED | 5.0.0 73 Irish + Ireland ga_IE 74 Italian + ++ Italy it_IT it 2,904,302 75 Japanese - ++ Japan ja_JP 76 Kannada + India kn_IN 77 Kashubian + Poland csb_PL 78 Kazakh + Kazakhstan kk_KZ 79 Kenya Swahili + Kenya sw_KE 80 Kinyarwanda + Rwanda rw_RW 81 Korean + South Korea ko_KR 82 Kurdish + Turkey ku_TR 83 Kyrgyz + Kyrgyzstan ky_KG 84 Latin + la_VA, la_LA 85 Latvian + Latvia lv_LV 86 Lingala + Dem. Rep. of Congo ln_CD 87 Lithuanian + Lithuania lt_LT 88 Lower Sorbian + Germany dsb_DE 89 Lowlands Saxon + Germany nd_DE 90 Luganda + Uganda lg_UG 91 Lule Sami + Norway, Sweden smj_NO 92 Luxembourgish + Luxembourg lb_LU 93 Macedonian + Macedonia mk_MK 94 Maithili + Nepal, India ma_IN 95 Malagasy + Malagasy mg_MG 96 Malay + Malaysia ms_MY 97 Malayalam + India ml_IN 98 Maltese + Malta mt_MT 99 Manx Isle of Man gv_GB DEPRECATED | 5.0.0 100 Maori + New Zealand mi_NZ 101 Marathi + India mr_IN 102 Mexican Spanish + + Mexico es_MX 103 Moldovan + Republic of Moldova ro_MO 104 Mongolian + Mongolia mn_MN 105 Mossi + Burkina Faso mo_BF 106 Nepali + Nepal ne_NP 107 New Zealand English + + New Zealand en_NZ 108 Nicaraguan Spanish + + Nicaragua es_NI 109 Northern Sami + Norway se_NO 110 Northern Sotho + South Africa ns_ZA 111 Norwegian Bokmal + Norway nb_NO nb 888,428 112 Norwegian Nynorsk + Norway nn_NO 113 Occitan + France oc_FR 114 Odia + India or_IN 115 Oromo + Ethiopia om_ET 116 Panamanian Spanish + + Panama es_PA 117 Panjabi + India, Pakistan pa_IN 118 Paraguayan Spanish + + Paraguay es_PY 119 Persian + Iran fa_IR 120 Peruvian Spanish + + Peru es_PE 121 Polish + ++ Poland pl_PL 122 Portuguese + ++ Portugal pt_PT pt 993,633 123 Puerto Rican Spanish + + Puerto Rico es_PR 124 Quechua + Bolivia qu_BO 125 Romanian + Romania ro_RO 126 Russian + ++ Russia ru_RU 127 Russian (strict letter 'Yo') + + Russia ry_RU ru 128 Salvadoran Spanish + + El Salvador es_SV 129 Sanskrit + India sa_IN 130 Sardinian + Italy sc_IT 131 Scottish + Gaelic Scotland gd_GB 132 Serbian (Cyrillic alphabet) + Serbia sr_CY 133 Serbo-Croatian (Gaj's Latin alphabet) + Serbia, Croatia, Bosnia and Herzegovina, Montenegro sr_LT 134 Shona + Zimbabwe sn_ZW 135 Shuswap + Canada shs_CA 136 Simplified Chinese - ++ Mainland China, Singapore zh_CN 137 Sinhalese + Sri Lanka si_LK 138 Slovak + ++ Slovakia sk_SK 139 Slovenian + ++ Slovenia sl_SL 140 South African English + South Africa en_ZA 141 Southern Ndebele + South Africa nr_ZA 142 Southern Sami + Norway, Sweden se_SE 143 Southern Sotho + South Africa st_ZA 144 Spanish + ++ Spain es_ES es 3,207,402 145 Swazi + South Africa ss_ZA 146 Swedish + ++ Sweden, Finland sv_SE sv 861,730 147 Swiss German + ++ Switzerland de_CH 148 Tagalog + Philippines tl_PH 149 Tajik + Tajikistan tg_TG 150 Tamil + India ta_IN 151 Tanzanian Swahili + Tanzania sw_TZ 152 Tatar + Tatarstan tt_RU 153 Telugu + India te_IN 154 Tetum + Indonesia tet_ID 155 Tigrinya + Ethiopia ti_ER 156 Tok Pisin + Papua New Guinea tpi_PG 157 Tsonga + South Africa ts_ZA 158 Tswana + Botswana tn_ZA 159 Turkish + Turkey tr_TR 160 Turkmen + Turkmenistan tk_TM 161 Ukrainian + ++ Ukraine uk_UA uk 2,597,806 162 Upper Sorbian + Germany hsb_DE 163 Urdu + Pakistan ur_PK 164 Uruguayan Spanish + + Uruguay es_UY 165 Uzbek (Cyrillic alphabet) + Uzbekistan uz_UZ 166 Uzbek (Latin alphabet) + Uzbekistan uz_LT 110,214 NEW | 5.0.0 167 Valencian + Spain cat_ES 168 Venda + South Africa ve_ZA 169 Venezuelan Spanish + + Venezuela es_VE 170 Vietnamese + Vietnam vi_VN 171 Walloon + Belgium wa_BE 172 Welsh + Wales cy_GB 173 Xhosa + South Africa xh_ZA 174 Yiddish + yi_YI 175 Zulu + South Africa zu_ZA