Decades of fixing dialog templates in resource files disagree with any definition of the word "manageable".

Just for comparison, nowadays a shitton of desktop software doesn't look all too bad with just changing a gettext()-style list of strings, and not even touching the dialog definitions. You may argue that this is because the dialogs nowadays just look equally bad in all languages, but I'd disagree and anyway it definitely is an order of magnitude in "manageability".