Combine/ Integrate/ Replace text in one column from multiple?

Hi all,

I have a bit of a mess and I'm not even sure how to explan, so thanks just for reading, though any suggestions are much appreciated!

I can't share real data, so I'll try to explain best I can with example data.

I have Table1 below, where there are columns for country and city and other omitted columns, however each US entry has an incorrect city (I only want Paris to amtch with France and Berlin with Germany). There are duplicates but I need to retain all information in Table1 (the other columns have unique data in each row). 

The City column also has some blanks and cityies that won't match, so I can't do this for the larger data set. I need to filter out the bad actors first.

I created a reference table to Table1 'US' in Power Query, then fltered for US, since that is where the incorrect cities are. Then I have Table2 that has a list of common world cities with their respective countries where I have tried two things

1. Create new column using LOOKUPVALUE to return the correct world country for the 'US' table from Table2 [WorldCountries]

2. Created a relationship between US [City] and Table2 [WorldCities] so that Table2 [World Countries] can work with US [City]. 

Now where I am stuck: Is there a way to integrate the Table2 [World Countries] and the original Table1 [Country] into one column so that i can use this one correct column?

I hope that makes sense. Table1[Country] has 80% correct data, I just need to correct the other 20%. Any semi-simple way to do this?

Also, if it matters, in my real data I have 2 bad actors I need to correct and was planning on just repeating this process for the second.

Thank you!!