[EL] Simplify template code

[chopinesque]

Is there some way to simplify multiple templates like this in a way that one only needs to add tpl and expansion text? I.e. instead of these:

    if tpl == "μτχχρ":
        text = italic("μετοχή παθητικού παρακειμένου")
        return text if data["0"] else f"({text})"

    if tpl == "μυθολ":
        text = italic("(μυθολογία)")
        return text if data["0"] else f"({text})"

Something like

Some code here
"μτχχρ": "μετοχή παθητικού παρακειμένου"
"μυθολ": "μυθολογία"
Some code here

[BoboTiG]

I'll answer as a suggestion on #2250.