The Rig Veda is full of place and person names. Many of the mandalas are directly connected to specific priestly clans and while the Rig Veda is not an history book, it mentions many characters within it. After all, the core Mandalas 2-7 are known as family books for a reason. They are mandalas connected to the Bharatas, the main clan of the Rig veda and there are many mentions of the heroes from that clan.There was definitely a west-flowing river passing through Haryana and Rajasthan. However, it is debatable if the name is "Saraswati'. There are no place names or person names in Veda. Veda is not a history book. Immense intellect is required to understand Veda, its language is not common Sanskrit. The language of Veda cannot be understood by Pundits.
Incorrect to say no place or person names. As for language, there are changes in languages over time, even English written or spoken a 1000 years ago would be very difficult to understand now.