My english is poor also... so what you can do in this case:
1) before enabling the mod go to C:\Ubisoft\Silent Hunter 5\MODS\Speech Recognition_v1.4_MiTons_NewUI_Editon _english\data\Scripts\Menu
2) here you will have an file called : Speech Recognition.py
3) open this file with notepad and search for this line:
speech.Confidence = 0.75 # This is the default and could be ommited!
4) change the line for example like this:
speech.Confidence = 0.65 # This is the default and could be ommited!
5) save
6) enable the mod... in this way the voice commands will be executed even your english is ,,so and so'' like my english