Translation of ruthless in Spanish

Regarding the meeting in early May: I could not reschedule the appointment at my daughter's doctor and I will definitely know if I can come during the first 2 weeks. I guess we should talk next week.
I will see if programmer can do it easily or not. Personally I don't need it. We use Facebook for marketing tool. Facebook uses a lot of short messages to communicated with users and fans. I forgot the exact name.
These may be linguistic and cultural differences. There are indeed various regions throughout Spain and the word choice is not always the same. It is sometimes hard to understand people from other cities.