Scenario: In this example Course A has English as Default and Slovakian and Hungarian as additional languages

Objective: Create a Course B that has Hungarian as Default and Slovakian and English as additional languages

1. Duplicate the Course to create Course B. This will keep your original (Course A) safe and now do the following operations on Project B
2. Do an XLIFF export on Course B
3. You get the XLIFF files for Slovakian and Hungarian languages
4. Change Course B to single language
5. Do an XLIFF export on Course B
6. You get the XLIFF files for English language
7. Change the default language to Hungarian
8. Import the Hungarian XLIFF files ONLY from the zip package you got in step 3
9. Now make Course B multi-language and add English and Slovakian as additional languages
10. Import the XLIFF files for Slovakian language from the zip package you got in step 3
11. Import the XLIFF files for English language from the zip package you got in step 6