Pesquisando sobre quais são as opções de idiomas que poderia passar em toLocaleString, encontrei uma lista no qual compartilho com vocês:
| Sigla | Idioma |
|---|---|
| ar-SA | Arabic (Saudi Arabia) |
| bn-BD | Bangla (Bangladesh) |
| bn-IN | Bangla (India) |
| cs-CZ | Czech (Czech Republic) |
| da-DK | Danish (Denmark) |
| de-AT | Austrian German |
| de-CH | “Swiss” German |
| de-DE | Standard German (as spoken in Germany) |
| el-GR | Modern Greek |
| en-AU | Australian English |
| en-CA | Canadian English |
| en-GB | British English |
| en-IE | Irish English |
| en-IN | Indian English |
| en-NZ | New Zealand English |
| en-US | US English |
| en-ZA | English (South Africa) |
| es-AR | Argentine Spanish |
| es-CL | Chilean Spanish |
| es-CO | Colombian Spanish |
| es-ES | Castilian Spanish (as spoken in Central-Northern Spain) |
| es-MX | Mexican Spanish |
| es-US | American Spanish |
| fi-FI | Finnish (Finland) |
| fr-BE | Belgian French |
| fr-CA | Canadian French |
| fr-CH | “Swiss” French |
| fr-FR | Standard French (especially in France) |
| he-IL | Hebrew (Israel) |
| hi-IN | Hindi (India) |
| hu-HU | Hungarian (Hungary) |
| id-ID | Indonesian (Indonesia) |
| it-CH | “Swiss” Italian |
| it-IT | Standard Italian (as spoken in Italy) |
| ja-JP | Japanese (Japan) |
| ko-KR | Korean (Republic of Korea) |
| nl-BE | Belgian Dutch |
| nl-NL | Standard Dutch (as spoken in The Netherlands) |
| no-NO | Norwegian (Norway) |
| pl-PL | Polish (Poland) |
| pt-BR | Brazilian Portuguese |
| pt-PT | European Portuguese (as written and spoken in Portugal) |
| ro-RO | Romanian (Romania) |
| ru-RU | Russian (Russian Federation) |
| sk-SK | Slovak (Slovakia) |
| sv-SE | Swedish (Sweden) |
| ta-IN | Indian Tamil |
| ta-LK | Sri Lankan Tamil |
| th-TH | Thai (Thailand) |
| tr-TR | Turkish (Turkey) |
| zh-CN | Mainland China, simplified characters |
| zh-HK | Hong Kong, traditional characters |
| zh-TW | Taiwan, traditional characters |
