Templates are created independently in each wiki. In order for Content translation to know how to copy the parameters from one in the source article to the equivalent one in the target wiki, metadata is needed. Currently Content translation relies on templateData to know which parameters to copy the information of the template over. The "url" parameter works because it has the same name in both languages. For "tytuł", Polish Wikipedia editors can edit the templateData to add a "title" alias that help the tool to know they are equivalent.

We are working on improving these mappings automatically (T224721), surfacing the errors when that is not possible (T209473, T206310), and providing a cleaner way for users to fix the mappings (T221534, T222059). With so many templates in each language, the tool cannot provide specific support for all possible combinations but we are trying to provide general mechanisms to provide a better support and tools for editors to improving it when needed.

Since the ticket focuses on mandatory parameters, I think it makes sense to mark it as a duplicate of T206310: CX2: Highlight references with a template that is missing mandatory parameters after being adapted but I wanted to provide some additional context.

Thank you, I have requested introduction of aliases to Cytuj stronę (= Cite web) on Polish Wikipedia. This is a critical template, so I'd rather let to do it other people that already have done changes in it before.

In T225989#5273626, @Pginer-WMF wrote:

For "tytuł", Polish Wikipedia editors can edit the templateData to add a "title" alias that help the tool to know they are equivalent.

Aliases suggests that these alternative parameter names can be passed in code. So when we add "title" as alias for "tytuł" something can suggest "title" can be written in code. This is how I understand aliases. So, it may be work for CT but may make confusion elsewhere.

Good solution is to create mappings using mechanism used to match citoid fields.

In T225989#5273844, @Wargo wrote:

In T225989#5273626, @Pginer-WMF wrote:

For "tytuł", Polish Wikipedia editors can edit the templateData to add a "title" alias that help the tool to know they are equivalent.

Aliases suggests that these alternative parameter names can be passed in code. So when we add "title" as alias for "tytuł" something can suggest "title" can be written in code. This is how I understand aliases. So, it may be work for CT but may make confusion elsewhere.

Yes, mapping templates based on parameter names and aliases is a limited approach based on the information about templates that exists today. As mentioned in T225989#5273626, we plan to provide cleaner and more scalable mechanisms.

Regarding the use of aliases, I'm not familiar with potential problematic side-effects, but it is up to the community to decide whether it is acceptable as a solution, even if it is a temporary one.

Good solution is to create mappings using mechanism used to match citoid fields.

Citoid information is already integrated. If such information is present for a template but not working as expected when being mapped we are interested in the details to investigate it further.

Thanks!