Export Memrise course words to CSV. There is also a Chrome Extension: https://chrome.google.com/webstore/detail/memrise-export/hcllgkpmoiolndnhmbdceffaidjmkoam

memrise-export.js

/*

UPDATE: This is now a Chrome Extension: https://chrome.google.com/webstore/detail/memrise-export/hcllgkpmoiolndnhmbdceffaidjmkoam
Source Code: https://github.com/raineorshine/memrise-export

Export Memrise course words to CSV (technically TSV, or "tab separated file", but it is effectively the same).

1. Log into Memrise.
2. Navigate to the course page you would like to export (e.g. https://app.memrise.com/course/2156672/german-random-01/).
3. Open the browser's Developer Console (https://support.airtable.com/hc/en-us/articles/232313848-How-to-open-the-developer-console)
4. Paste the below script into the console and hit enter.
5. After all pages have been loaded, copy and paste the final word list into spreadsheet.

*/

(() => {

  /** Returns a Promise of a list of all words in a course. */
  function getWords(courseId, level=0) {
    if (level > 0) {
      console.log(`Loading Page ${level}...`)
    }
    const url = `${location.origin}/ajax/session/?course_id=${courseId}&level_index=${level + 1}&session_slug=preview`
    return fetch(url, { credentials: 'same-origin' })
      // parse response
      .then(res => res.ok
        ? res.json()
          // map results
          .then(data => {
            const { name, num_things, num_levels } = data.session.course
            if (level === 0) {
              console.log(`Exporting ${num_things} words (${num_levels} pages) from "${name}"`)
            }
            return data.learnables.map(row => ({
              original: row.item.value,
              translation: row.definition.value
            }))
          })
          .then(words => {
            // RECURSION
            return getWords(courseId, level + 1)
              .then(words.concat.bind(words))
          })
        // print an error if they are not logged in
        : res.status > 400 ? res.text().then(text => {
          console.error(`Error (${res.status}): ${text}`)
          return []
        })
        : []
    )
    .catch(err => {
      console.error(err)
      return []
    })
  }

  // parse the course id
  const courseId = location.href.slice(30).match(/\d+/)[0] 

  // get the words
  getWords(courseId).then(words => {
    if (words.length > 0) {
      const output = words.map(word => `${word.translation}\t${word.original}\n`).join('')
      console.log(output)
    }
  })

})()

The script did not work for me on the console (for this course) but the Chrome Extension did (thank you!). It would be great to export all the mems, but only if it was possible to reimport them on another Memrise course (is it possible?)