There is no need to worry about actual "spoken" speech until around 18 months, and really only if they haven't even used their first words yet. If your child is babbling, showing joint attention, involves you/other people in her play, and seems to recognize their name/common words etc, then I wouldn't worry. I am a speech pathologist and I have included some helpful links below.
Re: Speech - regression?
https://www.speech-language-therapy.com/index.php?option=com_content&view=article&id=34:ages&catid=11:admin&Itemid=117
https://www.speech-language-therapy.com/index.php?option=com_content&view=article&id=35:admin&catid=2:uncategorised&Itemid=117