Not sure if it’s exactly the same than what you’re doing here, but I tried out something like that for Hebrew because it’s unlike any language I learnt before and I had a really hard time in the beginning.
Most words being three letters (consonants) I have Person (man or woman depending on the genus of the word) – Place – Pet/Helper.
Depending on which vowel the consonants are carrying, the people are using a Tool/weapon/accessory, they are in a certain Location in the place and the Pet has a certain state.
So have Letter/Syllable 1: Person-accessory, letter/syllable 2 : place-location, letter/syllable 3 : pet-state.
Example: אֹזֶן (ear) aleph-holam (Arwen with a soccer ball), zayin-segol (Zanzib bazar, at the artist’s booth), nun (Nemo the fish, in no particular state because nun carries no vowel). The image is: Arwen (feminine) posing to be painted at the artist’s booth in Zanzib, holding a soccer ball in one hand and a fish bowl with Nemo in the other hand. The artist is fascinated with her elvish pointy ears.
My conclusions :
- It’s definitely useful when you have a word that is completely foreign, and you don’t even know how to start to remember it because you don’t know what to link it to.
- It’s useful for spelling (is the e in ozen a segol or a shva? Segol because she’s at the artist’s booth and not Hakim’s emporium)
- It’s useful for gender (is ozen masculine or feminine? Feminine because it’s Arwen and not Aragorn)
- You definitely become more fluent with time and it can be quite quick because the word often comes back to you when you just think about the image instead of having to visualize all the details (ear? Something with Arwen getting her portrait done… oh yeah “ozen”)
- BUT it’s still very slow to encode/decode. You get quicker with time but frankly if you can find sound-mnemonics it’s much better. I use it only on the most difficult words, that I always get wrong because it gives me a starting point.
- Was it worth the time I spend developing it? I tend to say no, but I like experimenting so I’m glad I tried it, it was kind of fun.
- If I were to start again? I would keep it much more simple, with only a list of people for the first syllable/letter (because it gives you the beginning of the word which often means the rest comes more easily and because it gives me the grammatical gender).
- So for my example it would be Arwen (feminine) with her super elvish ears can hear the ozone layer breaking but she stays zen about it : ozone-zen>ozen.
If spelling is hard you can always add details later. In my example, segol is always something artistic and shva always something magic/religious (because of the places they are stored in the memory palace I used to learn the alphabet). So ozen with segol is because she’s listening to the music of the winds in the atmosphere. Written with shva it would be her praying the ozone depletion doesn’t get worse, etc.
So I think it’s probably too unwieldy a system to be very efficient, but that shouldn’t stop you have fun experienting 