We use, if needed, apostrophes or upticks. 2’999,95. No danger of messing up between . and , that way.
Also let’s just wait until that person learns that not every country separates into blocks of 3 and how many options of mixing and matching there are in use.
FishFace@piefed.social 3 weeks ago
Separators aren’t useless; they help greatly in reading large numbers.