Is there a way to turn every death sound into roblox death sound?

Since you do not care then go for it I guess? I'll do my best but I've got no access to a computer with league on it today and I don't know if my theories will even work.

Again, I'd like to caution against doing this as Riot has said they do not like players changing the game to allow them to use content without paying for it. A good rule of thumb: don't cheat Riot out of the money they deserve for their hard work.

This might fall under the same category, but then again maybe not. Since it's not a sound created by Riot maybe it is considered ok because you won't be cheating to use content that they expect you to pay for before using. Do any Rioters or Mods want to weigh in here?

Also @mods, I'm genuinely only helping with this because it seems harmless. I don't believe I'm doing wrong here but if I am then please let me know, I'll happily comply and I can delete my comments and/or make them more generic.

Off the top of my head:

1. Find the champions game files under C: Riot Games / somethingfolder / champions (this isn't the exact folder path, I'm just guessing for now, you can just try clicking around the folder structure)
2. Find the files that are the death sounds, probably have stuff like "ashe_death.wav" (I'm not sure which type of sound file they will be, you will have to check, you can right click and go to properties for more info)
3. Get a copy of the sound you want to replace them with and save it in the same file format (with the same extension) as the file you are replacing. For example it will be saved as a .wav file if the champion's death sound is WAV, or .mp3 if it's an MP3. In the past I've used programs like "format factory" to change file formats. Disclaimer: I don't know if it's still supported nor if there are safe copies to download. Before getting a program to use, you should do your research and only download at your own risk.
4. Copy your replacement sound file into the folder and replace it's name with the name of the champion's death sound. For example with ashe you would copy the "roblox_death.wav" file into the same folder as ashe's death sound, then delete the ashe death sound and rename the new file to say "ashe_death.wav"

With this the game should grab your sound file to play when ashe dies instead of ashe's original sound file.

I have no idea if this will actually work and I'm not going to test it myself, but that's how I'd go about setting it up if I wanted it to do this.