Anonymous - Excellent points.- especially in par. 1.
I am also aware that the Congo has been used as an exchange country for funds being extracted from other countries. That would explain the cong increase as they funneled money through newly created congregations, then back to Warwick.
I am aware that some countries still have more than one-language congs. The US has many Spanish congs still, but they have discontinued almost all the other languages. The reasons were as you stated:
"they are often nearly independent from branches, lack ‘spiritual food’ (even getting English literature was spotty because the branch doesn’t like shipping small orders) leading to independent Bible study and thinking."