I am NOT a TPR teacher, but I have certain hand gestures that I use consistently to avoid speaking English. You can also encourage your students to use gestures when they can't think of a word in Spanish. The gesture is better than the English word because gestures are universally understood and a non-linguistic form of communication.
Sketching can be used in much the same way as those translation exercises once were. If you want to check reading comprehension, for example, having students sketch what they understand can be a great way to see what they are getting out of it. You can see both what students included in their sketch AND what they left out. Both of these are important and worthy of attention. This also allows you to go back and squeeze more information out of your students by asking them to add DETAIL to their sketches.
The consistent use of symbols are icons to represent words has been one of the most important turning points in my instruction. For every word my students learn, I assign that word an icon. I cement that icon in their brains WITH the word and I NEVER let them see the English word. This has increased vocabulary retention so much in my classroom. Our brains remember pictures much better than a word, especially when that picture has meaning. The icons I use are kept consistent throughout all the different levels, on every assessment, and in every activity. Repeated viewing of the icon accompanied with the Spanish word has been a crucial step towards my increased use of the target language with students.