Unable to translate certain pages from context menu

[srirambv]

Description

Unable to translate certain pages from context menu

Steps to Reproduce

1. Visit https://ja.wikipedia.org/wiki/ in nightly
2. Right click on page and click on Translate
3. First time it shows translation failed
4. Right click second time and click on translate
5. Shows trasnlated but only few words actually get translated.

Actual result:

Unable to translate certain pages from context menu

Expected result:

Should translate all pages

Reproduces how often:

Easy

Brave version (brave://version info)

Brave	0.65.56 Chromium: 74.0.3729.75 (Official Build)nightly (64-bit)
Revision	fdb7915642fef8cf997beac2554709d148e3c187-refs/branch-heads/3729@{#754}
OS	Linux

Version/Channel Information:

• Can you reproduce this issue with the current release?
  No

• Can you reproduce this issue with the beta channel?
  No

• Can you reproduce this issue with the dev channel?
  Dev just shows translating bubble but doesn't actually translate it

• Can you reproduce this issue with the nightly channel?
  Yes

Miscellaneous Information:

cc: @yrliou