The problem with tags is that without a standard, how do we know what tag you will officially pick up?
0 Scale (trains)
O Scale (trains)
1:48 (neutral)
1/48 (neutral)
Quarter Scale (dollhouse)
1/4" = 1'-0" (architecture)
Lego also approx fits in this scale
all these are about the same, and I'm sure I've missed some other terms
I use 1:48 in the titles of my postings, even though it has required some education of my customers who are more accustomed to other terms.
And I would reiterate that if "scale models" is intended to be for more than trains, you might want to embrace either neutral key words such as numerical proportions, or at least embrace some scales that represent other hobbies so it is not just train scales listed. Or possibly the best solution, move the scales to the trains page, and add different, more appropriate scale keywords under furniture, vehicles, etc.