I think I have found a bug with the MiG-29 Standalone Version (Not the full Flaming Cliffs 3 module).
I am using Devrim's English Cockpit Mod and I am able to select the English cockpit (change the drop down from Default to English just like the mod should work) in the MiG-29 section in Special Options, But when i jump into the aircraft it still has the default unmodified russian panel.
I have a buddy who has the whole Flaming Cliffs 3 module, and it works fine for him and his MiG-29, It seems to only be an issue with the Standalone MiG-29
(I get that its a mod and all, but it seems this issue is a problem with the module and not the mod)
So it seems as if it is a bug within DCS World that might need to be looked into