This isn't limited to WPML (or even WordPress), of course, as it's about translating dynamic strings in general. But SEO best practices say you must have a very specific keyword focus in your title and whatnot or your words will never be seen by human eyeballs ⸺ that your efforts will be for naught but to train some unknown but all-knowing AIs that will never pay you for your contribution.
Keep on readin' on Limiting dynamic WPML translations to one instead of hundreds⟶