diff --git a/services/spelling/test/acceptance/js/CheckTest.js b/services/spelling/test/acceptance/js/CheckTest.js
index 981d64b563..2f55d992d8 100644
--- a/services/spelling/test/acceptance/js/CheckTest.js
+++ b/services/spelling/test/acceptance/js/CheckTest.js
@@ -3,11 +3,12 @@ const request = require('./helpers/request')
 
 const USER_ID = 101
 
-const checkWord = words =>
+const checkWord = (words, language) =>
   request.post({
     url: `/user/${USER_ID}/check`,
     body: JSON.stringify({
-      words
+      words, 
+      language
     })
   })
 
@@ -78,4 +79,53 @@ describe('checking words', () => {
       }
     })
   })
+
+  describe('when a very long list of words with utf8 responses', () => {
+    beforeEach(async () => {
+      let words = []
+      for (let i = 0; i <= 20000; i++) {
+        words.push('anéther')
+      }
+      response = await checkWord(words, 'bg') // use Bulgarian to generate utf8 response
+    })
+
+    it('should return misspellings for the first 10K results only', async () => {
+      const body = JSON.parse(response.body)
+      expect(body.misspellings.length).to.equal(10000)
+    })
+
+    it('should have misspelling suggestions with consecutive indexes', async () => {
+      const body = JSON.parse(response.body)
+      const indexList = body.misspellings.map(mspl => mspl.index)
+      expect(indexList.length).to.equal(10000) // avoid testing over an incorrect array
+      for (let i = 0; i < indexList.length - 1; i++) {
+        expect(indexList[i] + 1).to.equal(indexList[i + 1])
+      }
+    })
+  })
+
+
+  describe('when multiple words with utf8 are submitted', () => {
+    beforeEach(async () => {
+      response = await checkWord(['mneá', 'meniésn', 'meônoi', 'mneá'], 'pt_BR')
+    })
+
+    it('should return the misspellings for all the words', async () => {
+      const body = JSON.parse(response.body)
+      expect(body.misspellings.length).to.equal(4)
+    })
+
+    it('should have misspelling suggestions with consecutive indexes', async () => {
+      const body = JSON.parse(response.body)
+      const indexes = body.misspellings.map(mspl => mspl.index)
+      expect(indexes).to.deep.equal([0, 1, 2, 3])
+    })
+
+    it('should return identical suggestions for the same entry', async () => {
+      const body = JSON.parse(response.body)
+      expect(body.misspellings[0].suggestions).to.deep.equal(
+        body.misspellings[3].suggestions
+      )
+    })
+  })
 })