Width of Topics and Posts columns in Board Index is causing problems with language packs

The width of the Topics and Posts columns in the Board Index is causing problems with the Dutch language pack (and presumably others). This can be seen clearly in the attached screenshot. The Dutch words for Topics and Posts are Onderwerpen and Berichten, which are longer than the English equivalents, from which the column width is obviously derived. It would be nice if the column width could depend on the language pack used so that the column titles are always legible in whatever language the phpbb3 forum is used.