When we say that a language is culturally transmitted - that is, that it is learned rather than inherited - we mean that it is part of that whole complex of learned and shared behavior that anthropologists call culture.
<speak version='1.0' xmlns='http://www.w3.org/2001/10/synthesis' xml:lang='en-US'>
<voice name='en-US-GuyNeural'>
A dry spell accounts for the poor crop.
</voice>
</speak>
<speak version='1.0' xmlns='http://www.w3.org/2001/10/synthesis' xml:lang='en-US'>
<voice name='en-US-GuyNeural'>
I had a short spell in the hospital.
</voice>
</speak>