Abby (and Chris), thank you so much for this information, particularly the form of graphs which make it so much easier for me (at least) to comprehend and understand.
I do not have much more to add as I believe the observations made by Jim Richardson (probably a cousin as I have Richardson ancestry), D Anon (who is definitely a cousin), Melissa Arjona, David Randall (great 15 tours presentation on our 15th anniversary) and all of the others responding to this post.
I agree that the comment "Everyone is Welcome" is not necessarily going to help make our Tree more inclusive, more diverse, or to get people to go where they have never gone before (my apologies to Star Trek). Sometimes we need to be 'gently' forced out of our comfort zone (like I was when I lived in East Asia for 3 years teaching for the military - and not so gently forced...shocked more like).
English speaking countries have greater representation on our Tree by virtue of the fact that English is still the most spoken language followed by (are you all ready for this?): Mandarin, Hindi, Spanish, French, Arabic, Russian, then Portuguese.
Japanese and Korean are not even listed, yet their contributions to technology, comic books (yup, even before common US comics) Anime, hand fans, film (Kurasawa was a role model for the likes of Scorsese, Spielberg, Eastwood and other American directors...he gave us Fistful of Dollars in the form of Yojimbo and Magnificent Seven in the form of Seven Samurai). Oh...and the very first full novel in the word was written by a Japanese WOMAN, Murasaki Shikibu's Tale of Genji.
There's so much more, but I want to mention Korea: technology, ondol heating, which was adapted by Frank Lloyd Wright after a visit to Japan (the Japanese copped this excellent under-floor heating concept from Korea), bullet proof vests, Hangul (the featural writing system...I learned it when I lived in Korea), moveable type and more! BOTH countries gave us traditional medicine (e.g., acupuncture, accupressure, herbal remedies). Oh, and lets not forget Martial Arts!
OK...we need to find ways to get a number of our members out of their Western European, English speaking comfort zone to truly make WikiTree more global AND start to feature/emphasize women. Someone commented during the Anniversary that one of the most common surnames on our Tree is 'Unknown'. No prizes for guessing which sex gets this LNAB the most.
Alternatively, we cannot CRAM this diversity down Wiki-members throats because it will turn them off. There is no doubt that the cultures I described above (Japan, Korea), as well as others may not be of interest to our members because of their 'Western safety zone.'
Perhaps we could try something like a genealogical 'Treasure Hunt' on a monthly basis to get members engaged. By Treasure Hunt I mean spending a couple of weeks to a month 'discovering' various famous Martial Artists (other than the Walker Texas Ranger guy, who is from the US) and Bruce Lee who everyone reveres, and find out who in Korea, Japan, China, the Philippines are 'notable' martial artists and include information on their culture, beliefs, location, language spoken, arts techniques and such. Maybe depending on how much (or little) they contribute, they could be awarded a belt sticker (white, yellow, green, blue, red, black , I think those are all the color levels) depending on the number of profiles they do (and PROFILES as COMPLETE as possible - not just a name and birth dates). So if they do six fab profiles, they get a black belt. Don't ask me to lead this because I watched Korean, Japanese Okinawan martial arts, but never practiced. I spent my time spelunking on Okinawa to find Japanese death artifacts, learning ikebana, watching Kurasawa films with my favorite actor Toshiro Mifune (who was better in Yojimbo than Eastwood in Fistful of Dollars).
Any of contributions over the centuries (medicine, business practices, technology, arts like kibuki, bonsai/ikibana, printing, Anime, etc.) could be topics that might entice more of our members to participate and learn more about things that they do (other than WikiTree) but have no idea where it began. Especially if they have backgrouns in medicine, tech, theatre, etc. These activities could also help us grow our East Asian, etc. profiles.
That's all I have to say. Now I have to return to working on my kid sister's paternal line (we have different fathers) as a Christmas present. Her paternal line is all German, Swedish and Polish...talk about being out of my comfort zone! Japanese and Korean are easier than these German and Swedish names and locations. I can only mimic the Swedish Chef on Sesame Street. I have to acknowledge Maria (Hedberg) Lundholm for all her help with the Swedish ancestors! She's expanded a generation or two, found records (in Swedish), added those little circles over the A and has had the patience of a saint with me!