I am going at a quite fast pace of 100 words per day. Not so much this week, due to being busy with other stuff. My initial retention rate is about 60%. About 20% of the words I learn are troublemakers I have to repeat over and over.
My goal is learning the Core 6000 Japanese in roughly 2 months, memorizing them within 6 months.
Over 1500, I guess. Can't go by the number under my name because I think it includes other stuff.
Reading comprehension is about 75%, depending on material. I might not understand every word or idiom, but generally I get most of the meaning.
Spoken is less than 50%, because they talk so darn fast and slur it all together! If I ask them for slow & easy and they speak to me like they would to a little kid, then I get most all of it. But they don't normally talk that way. (grin) A few of them drop the endings of words too, which makes it virtually impossible for me.
About 900. I had been learning Czech for a couple of months before joining Memrise so I knew some words already.
I'm a very good guesser, but I probably genuinely understand about half of what I read (in an elementary text book! :D )
My only contact with a Czech native speaker is on Skype. If he were to speak normally I'd understand virtually nothing of what he said. I listen to Czech radio and also watch some Czech films with English subtitles. I understand about one word in 50, so, not great! Oh well, onwards and upwards.
20%? But this is very dependent on the type of material - teaching/for younger readers/amount of specialist vocab, proper nouns, jargon and slang. (Contrast this with oft-repeated claims like "You can read 90% of most written material after you learn the 900 most common characters". Comprehension of words (single or multiple characters) matters most, not recognition of individual characters - which memrise's system tends to reward, unfortunately.
Native speakers who speak at native pace, making no effort to dumb things down: 10% at best, virtually unintelligible outside of set phrases. In order to understand let alone converse, the speaker has to slow down considerably and limit their use of vocabulary as if they were speaking to a particularly stupid child. Then I'm golden!
I use it for several languages including French. I cannot tell you any numbers (most of the words are not new to me) but I have had success in France. I used correctly a few words I learnt in Memrise which I wouldn't have remembered otherwise (I don't use them much even in my native language). And they helped a lot in that moment.
Interlingua (not on this site), French, Icelandic, Welsh, (when I find some good lists) German.
I don't know how to find the statistics precisely. Interlingua, Welsh, Icelandic and German I have just began to use, so I can't say how much per language. On total, 77.
Varies from language to language, but I generally do better than fifty percent.
German words are simple enough. Interlingua is not a spoken language, just a tool to better learn languages, so does not count. I've never heard a Welsh speaker, so I can't say. The French that I have heard so far is impossible to understand because of my limited vocabulary. Maybe that cursed Rosetta Stone slowed it down too much?
I'm deeply interested in languages. If I knew how, I'd probably practice more than one language on LiveMocha.com, assuming that's possible. That would help greatly with conversational comprehension, but I recommend having a decent vocabulary.