Motivated by Pete's Crash Fusion guide I did the same textbox counting for Spyro Fusion. Since you cannot skip cutscenes in this game, you will have to mash through all the text instead. Unsurprisingly, different languages result in a different amount of textboxes throughout the game, making some languages technically faster than others. Here is an overview for the amount of textboxes per language:

There is a difference between the total number of textboxes and the number of textboxes encountered in the speedrun (same amount for all categories) because 1. The cutscene that appears after beating the first minigame can be skipped by pressing Start (except in NTSC-U), and 2. you can just soft reset during the ending cutscene in order to skip the credits.

That being said, naturally, Japanese is technically the fastest with around 30 textboxes less than any of the European languages. Unlike with Crash Fusion, Spyro's fastest PAL language for speedrunning is English, followed by French (with just one more textbox). German has the most textboxes all around. Of course, realistically speaking, this will never really factor into the final time of a full run but it's nice to have this documented.