No Language Selection dialog

I've got a working installer using MUI. I've loaded a second language file and I have some langstrings (but not all) defined for the second language.

I've added the MUI_LANGDLL_DISPLAY macro to my .onInit, but it's not displaying, and $LANGUAGE after the macro has the value "${MUI_LANGDLL_PUSHLIST}" in it.

What's going on?

... and I get this compile warning:

unknown variable/constant "{MUI_LANGDLL_PUSHLIST}" detected, ignoring (macro:MUI_LANGDLL_DISPLAY:24)

Using MUI 1.70.

OK, I need to define the .onInit function after the language macros that include the language files. Argh.