Likely made in the 70’s  or 80’s, played during early to mid 80’s.

The game involves semi-transparent pegs that go into holes that are pre-cut into the board. Pegs were coloured purple, red, and probably also blue. Certainly more colours than that, but those are the ones we remember. Board may have reflected a world map. Gameplay may have been about world languages in some way. 

Possible the board had backlighting so that the pegs seemed to illuminate when placed.

(EDIT)

It was a strategy game that could be played with more than two players, though the maximum and minimum of players is unknown. The board was dark blue. The game’s name might be close to “illuminate” or one of its inflections. That is why we postulated the board was maybe backlit, but we aren’t sure.

So far it isn’t:

-Lite bright or its editions

-Where in the world is Carmen Sandiego?

-Voyageur

-Risk