Add native sentiment analysis for other languages

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Add native sentiment analysis instead of relying on ~~Google Translator~~ on polyglot for some commonly-used languages
In order of use (check logs below):

- [ ] Italian
- [ ] Portuguese
- [ ] Spanish
- [ ] German
- [ ] Danish

``` python
Counter({'it': 414, 'en': 75, 'pt': 55, 'de': 39, 'tl': 28, 'vi': 23, 'sw': 18, 'af': 18, 'nl': 16, 'ro': 15, 'cy':
15, 'hu': 15, 'ca': 11, 'et': 11, 'so': 10, 'fi': 9, 'id': 9, 'es': 8, 'tr': 7, 'lt': 6, 'sk': 6, 'fr': 6, 'no': 6
, 'pl': 4, 'da': 4, 'hr': 3, 'sv': 3, 'lv': 1, 'sl': 1})

Counter({'es': 24, 'en': 12, 'de': 2, 'it': 2, 'pt': 1, 'et': 1, 'da': 1, 'fi': 1, 'vi': 1, 'tr': 1, 'so': 1, 'sl': 1, 'tl': 1})

Counter({'it': 80, 'pt': 19, 'de': 18, 'vi': 10, 'tl': 7, 'en': 6, 'so': 5, 'ca': 4, 'cy': 4, 'ro': 2, 'sk': 2, 'af': 2, 'hu': 2, 'id': 2, 'lt': 1, 'no': 1, 'es': 1, 'et': 1, 'pl': 1, 'sw': 1})

Counter({'it': 93, 'pt': 20, 'de': 18, 'vi': 10, 'tl': 7, 'en': 6, 'so': 5, 'ca': 4, 'cy': 4, 'af': 3, 'hu': 3, 'ro': 2, 'sk': 2, 'id': 2, 'lt': 1, 'no': 1, 'es': 1, 'et': 1, 'pl': 1, 'sw': 1})

Counter({'es': 7, 'fi': 1, 'tl': 1, 'lv': 1, 'sw': 1})
```

Start by locating the existing sentiment-analysis integration and where the project falls back to polyglot for non-English languages. Use the language checklist and the provided usage counters to confirm the initial priorities. Done means native sentiment analysis is available for Italian, Portuguese, Spanish, German, and Danish without relying on Google Translator or polyglot.

Written by the indexing model from the issue text.