The company has various license keys, some of which allow to use only the English interface, unlike the others where Russian is used.
The problem is:
Any entered text is automatically showed in the String table in section of current interface language.
But this table is not changeable, so I can't fill section of other language. Therefore if the user uses other interface language the text isn't visible.
If to open Report Designer with other interface language, instead of the entered text it will display identifiers. At replacement of identifiers by the new text, it creates new text constants which also have blank sections in String table for other languages.