@Lydia_Pintscher We need error messages defined for the following cases:
- the lexemes have different lemmas for the same spelling variant
- the lexemes have different languages
- the lexemes have different lexical categories
There are other errors that can appear but for those I'm going to assume that they should say the same as for items.
there is one message missing for items as well: the message to be displayed when they link to each other in statements. It's currently hardcoded for items and says "'The two items cannot be merged because one of them links to the other using the properties: [comma separated list of properties]". Should the message stay like that? For lexemes it might make sense to mention that the link can also be in the form or sense statements.
Apparently I can't read. It's also already in the previously mentioned ticket.