Is it OK to learn 2 languages at once?

Related questions

1. What is b1 level?
2. Will duolingo make you fluent?
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4. What is a standard English learner?
5. Is c1 level fluent?
6. How can I get 6.5 band score in ielts?
7. Is c1 fluent?
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Tags

1. #surface
2. #learning
3. #finnish
4. #already
5. #identical
6. #italian
7. #spanish
8. #similar
9. #highly
10. #twins
11. #might
12. #languages
13. #dating