To improve the accuracy of Google Translate for a specific language pair, you can use the Contribute feature in Google Translate. This feature allows you to evaluate beta translations and provide feedback to help improve the quality of the translations. To access this feature, click on the Contribute button in the top right corner of the Google Translate page. Then, select Evaluate beta translations and choose the language pair you want to improve. You will be shown a series of translation suggestions and asked to rate their accuracy. Your feedback will help Google improve the translations for that language pair.
Another way to improve the accuracy of Google Translate is to use the Personalized Translation feature. This feature allows you to train Google Translate to recognize your writing style and preferences. To use this feature, sign in to your Google account and click on the Personalized Translation button in the top right corner of the Google Translate page. Then, select the language pair you want to translate and start typing. Google Translate will use machine learning algorithms to learn your writing style and preferences and provide more accurate translations.
I hope this helps! Let me know if you have any other questions.