I have to admit I am a bit confused by this question.
Almost all lenses I have seen (including vintage Canon LTM) indicate whether they use metric or imperial somewhere on the lens. Usually after the infinity symbol or somewhere else near the focus scale. More modern lenses usually have both (ft/m).
In the case of Canon LTM it seems that "feet" is more common, I only very rarely encountered Canon LTM lenses scaled in "m", again it will be indicated what it is on the lens.
Cosina usually has both scales, if the space is very small and they can do only one scale they seem to default to meters though.