A lot of Spanish teachers have the Spanish Alphabet posted in their classrooms. This visual can help show students the extra letters in Spanish and also the Spanish pronunciation. However, I take mine a bit further. I have posted mine on a bulletin board and created a cognate word wall. I use word-strips or sentence strips post-its in three colors to differentiate between verbs, nouns, and adjectives.
As we come across cognates during our learning, whether it be from stories, worksheets, videos, or anywhere else that is NOT vocabulary from our textbook, I add the word to our cognate word wall. We continue to add throughout the year.
I encourage students to use these words in their writing and to incorporate them into their vocabulary since they already know the meaning of the word.