This will be useful for eliminate widely used templates {{ifTranslation}}/{{ifNotTranslation}}, {{TNT}}/{{TNTN}} and {{Ll}}.
Taret result for my proposal:
Note: maybe this should be separate magic word, as '#tlink' or '#tl' (or simple create these short aliases for this function)?
Version: unspecified
Severity: enhancement
See also: T47096: Add a way to transclude template or other page in the correct language of which this is one proposed solution