From left to right ;
can't comment on the first one, second appears like a fantasy, 3 th seems German, no comment on the last one.
All need better and closer pic's.
Always looking for Belgian Congo stuff!
Hi, you will need better pics of these to get anything like a useful opinion and it affects the reliability of that posted below.
From left to right, Japanese, Talwar (middle east/India/Afghanistan area), European circa WWI, some type of Sword/bayonet or short sword. The Talwars are often copied, though originals do exist and the same applies to the Japanese example and copies have been made for a very long time.
Whatever its just an opinion.
1. Japanese style - heavily faked so could be a repro
2. Indian - design has been around for hundreds of years but repros still made.
3. German WW1 sabre commonly known as the Blucher sabre.
4. Looks like the type of sword or hanger carried by infantryman in the 18th century.
Do they have any markings ?