Fortnite isn't saving my language
If your language isn't saving when you restart Fortnite, these steps should resolve this for you:
Go to C:\Users\[username\]AppData\Local\FortniteGame\Saved\Config\WindowsClient
Open GameUserSettings
At the end of the file, add:
[Internationalization]
Culture=en-USSave the file.
The Culture should be the language abbreviation you want. Below is a list of all the languages we support:
Arabic: Culture=ar
German: Culture=de
English: Culture=en
Spanish: Culture=es
French: Culture=fr
Italian: Culture=it
Japanese: Culture=ja
Korean: Culture=ko
Polish: Culture=pl
Portuguese (Brazil): Culture=pt-BR
Russian: Culture=ru
Turkish: Culture=tr