How can I make app by using only 1 language

Question

Which language is that

Answer 1

Please utilize the search bar before posting your question.
This has been answered so many times.

https://www.sololearn.com/discuss/1372676/?ref=app
https://www.sololearn.com/discuss/1548326/?ref=app
https://www.sololearn.com/discuss/236235/?ref=app
https://www.sololearn.com/discuss/1161881/?ref=app
https://www.sololearn.com/discuss/1066089/?ref=app
https://www.sololearn.com/discuss/1767745/?ref=app
https://www.sololearn.com/discuss/212078/?ref=app
https://www.sololearn.com/discuss/1834358/?ref=app

Answer 2

There many more exciting posts like I've provided above, use the search bar and access them.