Users can update their preferred language by choosing a language on the bottom of any Spark page. The default account language can be updated by navigating to Settings > Account. If you have selected a default language in the user file, any changes a user makes to their language preference will be overwritten with each import.
The following languages are supported in Spark:
| English name | Native name |
| Chinese, simplified | 简体中文 |
| Chinese, traditional | 繁體中文 |
| Dutch | Nederlands |
| English | English |
| English (Canada) | English (Canada) |
| English (UK) | English (UK) |
| French (Canada) | Français (Canada) |
| French (France) | Français (France) |
| German | Deutsch |
| Italian | Italiano |
| Japanese | 日本語 |
| Korean | 한국어 |
| Malay | Bahasa Melayu |
| Polish | Polski |
| Portuguese (Brazil) | Português |
| Spanish | Español |
| Spanish (Spain) | Español (España) |
| Swedish | Svenska |
| Taiwanese | 臺語 |
| Thai | ภาษาไทย |
| Turkish | Türkçe |
| Vietnamese | Tiếng Việt |