When you look up a GL account in one of the Posting Setup tables, the account list will be filtered on the valid GL account category.

However if you initial setup of the categories was done in ENU and you are now setting up posting groups in i.e. NLD, the category filter goes wrong and no accounts are shown to select.

Better would be to have the filter act multilanguage so no matter in what language you're working, accounts from the correct category wil be shown.