The 'Languages' section of the profile reflects the user's language knowledge.
The languages in the user profile
The 'Available languages' list on the left are the languages that are used in your company. This language set is determined by the administrator in the regional options.
Select a language in the 'Available' list and click on the 'Add' button to put a language in the 'Added' list on the right. The 'Added' list can hold one or more languages and should reflect a 'preferable language sequence'. The first language in the list is the user's mother tongue, followed by a second, third, fourth, ... language. Click on the 'Up' and 'Down' arrow beneath the 'Added' list to change the sequence.
If a user access the content in the browser and the content is translated the server uses the languages in the 'Added' list to present the information in a language the user knows best.
If you do not want the user to change his own language profile you should deselect the 'Changeable' option beneath the ''Available' list.