Add punctuation: You can only change your own user modes therefore the nickname will always stand for the nick that you are using at the time
A: You can only change your own user modes: therefore, the nickname will always stand for the nick that you are using at the time.

Add punctuation: onboard too in small groups max14 guests6 per coach including detailed theorylessons IndoBoarding and maneuvertraining
A: (on-board, too) in small groups (max.14 guests/6 per coach), including detailed theory-lessons, Indo-Boarding and maneuver-training.

Add punctuation: This image belongs to the following categories Skating
A:
This image belongs to the following categories: Skating.