Most common problem is wrong encoding of the text on the webpage.
You may follow the below mentioned steps and try to correct the encoding.

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For Mozilla Firefox:

• Go to 'View' dropdown menu
• In 'View' menu, go to sub-menu named 'Character Encoding'
• Select 'Unicode (UTF 8)' option and reload the page

For Google Chrome:

• Go to 'Settings'
• Click on 'Show advanced settings...'
• Go to 'Customize fonts...' under 'Web content' menu
• Select 'Unicode (UTF 8)' in 'Encoding' drop down menu and reload the page