Wordle is a website that lets you make pictures like the one below.
If you type in your speaking or writing exam answer it will show you where you have repeated words.
For example: the picture below is made up of words from my blog, words like 'present' and 'tense' are larger than others because I have repeated them.
So if a word is larger, you may have to change it to something else so that you have more variety of vocabulary in your answer.
For example:
In Spanish 'fui' (I went) could be changed to visité (I visited).
In French 'parce que' (because) could be changed to 'car' (another way of saying because).