There were localised OS/2 patches, but they never kept quite up to date. NT wasn't much better - at the time all OS were individually localised, with dozens of releases to support each country. It was only with Windows Vista this started to change properly (there was an international version of XP too, but I never used that).
OS/2 was great at multitasking for the time, and had fantastic VDM support (Mostly DOS, although you could run other real mode operating systems). The installation and driver support always sucked, however.
There was some innovative software released for it, just a pity a fair few of the technologies were half baked. I used it as my main OS until 1999, but then decided I wouldn't go into the millennium using a clearly dead product, and switched to NT. These days I mostly use BSD Unix, and some Windows.