For final migration to Babel Extension in Meta-wiki is needed adiitional parameter "`skipcat`" or "`supresscat`" and "`nocat`".
If #babel: called with this parameter (may be defined with any value), then page will not be included into Babel categories.
**Use case:**
Some Wikimedians is used custom design for theirs usepages. And often Babel-box extracted into subpage. But will be better include main userpages to Babel categories, but no these subpages.
As example, see [[//meta.wikimedia.org/wiki/User:Aphaia/Babel]] with using old-style templates with parameters for supressing categories, wrapped in a tag `<noinclude>`
Proposed code for migration of this page into Babel Extension (replacement {{user language}}) will be `{{#babel:plain=1<noinclude>|skipcat=1</noinclude>|ja|en-3|de-2|fr-1|it-1}}`