Visit SSA Names and read off the top 20 or more for as many age generations as you wish - Boomer (or older), Gen Y, Millenial, Zoomer, etc. Try to also include common names for names not native to your origin country. If you have fictional names of characters, take extra care to pronounce them consistently (you'd be surprised how often authors mess them up).
Say the names of each capitol with their country or associated province/state. It is intended to handle the comma between them Also as a phrase like "Last month, (country) signed a (peace treaty/economic deal/prisoner swap) with (another country) for the first time in over a decade.
- High population cities
- Interesting cities, known for major attractions or historical events
- Eiffel Tower
- Tokyo Tower
- The Statue of Liberty
- The White House ... and so on
Create new sentences and actively listen to your TTS results. To reduce hallucinations in your generated samples, you may have to go back and create additional recordings using replacements for robotic-sounding words in the context of a sentence.