If there is a container with the NBT of Lock:"String", the container is able to be opened either with an item with the NBT:

{display:{Name:'{"text":"String"}'}}

or with a translation that sets the key to the string "String":

{display:{Name:'{"translate":"test.the_key"}'}}

With this example, the container opens perfectly fine in English languages, but if a translation were to be set in another language, it would not work because the client checks if the strings match and they would fail.

Instead, the server should do the checks so the player cannot exploit this and modify their translations for an items string to open a container before they have a key.