Translation of temperamental in German

I ran across the bridge to reach the other terminal and asked at the check in counter which connecting flights were still available. I wanted to avoid having to drive into the city at any cost.
I have a few other short sentences by tomorrow. How can I pay for all these little translations? If I remember correctly I made also a small contribution through the channel last year... But I don't think you should charge for these ones.
I understand your English, it's not bad at all. Yes, the English vocabulary is much larger than the German. The more you might spend time using the language, the better your vocabulary knowledge will become.