When translating your resume you will need to translate each and every block in your profile including skills
Also, some skills need to manually be translated. You can use the same language for a skill, however, if you like to translate your skills follow the below steps.
How to translate your skills:
1. Go to Profile in the menu
2. Under Translations you find all the languages you have a profile in
3. Click on the language you want to translate
4. Click on the skill you like to translate and look at synonyms, here you should find a translation