Adding languages is easy. Keeping them aligned is the work.

The choices that prevent drift are made at the start. Text does not belong burned into an image or a video, because then every change means producing it again. All languages hang off one source, so it is visible which version is behind. And per language there is somebody who checks, rather than translates.

That last point is the heart of it. Machine translation has become good enough to make language six cost the same as language two, and to hold terminology consistent across a whole set. What it cannot do is judge whether the instruction matches your installation, or whether a term is used differently on site.

Often a project with us starts not with translating but with clearing out: laying the existing versions side by side, establishing which ones lag, and deciding what to update and what to retire. That is less work than it looks and it stops you carrying five versions of one problem forward.