Using Vim, I edited the i18n/en.json file to check if there were other keys for which the translations were in the case described by the issue. I failed to find others, here is my methodology:

• open the file using neovim (or vim, it will work as well): nvim i18n/en.json
• search translation having caracters others than alphanumerics, spaces (of any form), punctuation mark, colon, dollar and single quote: /\wikilambda[^"]*": \".*\zs[^[:alnum:][:space:]\.\,\$\']\ze.*"
• for each match, read the whole line (because some match may occur due to the greedy .*

So the only translation keys concerned the issue I detected are:

• wikilambda-editor-fn-step-tests
• wikilambda-editor-fn-step-implementations

However I failed to find any place in the code where the two keys were used. Probably worth to remove them unless I made a mistake.