WallETH was using token-definitions from MyEtherWallet/ethereum-lists. Unfortunately after the split of MyCrypto and MyEtherWallet it looks like this is no longer a good option as e.g. taylor who did most of the managing/merging there before has no longer permission to do so. And you already see PRs pile up there.
So when taylor suggested to open a new repo to solve this problem: I embraced the idea and opened a new github organisation called ethereum lists and already implemented the split and merging scripts discussed in #347.
So please PR your tokens, addresses and other data you have to contribute. Also happy about other projects using this data!