This system is designed as a bilingual translator, leveraging the GTTS library to support multiple Indian languages, including English (en), Bengali (bn), Gujarati (gu), Hindi (hi), Kannada (kn), Malayalam (ml), Marathi (mr), Tamil (ta), Telugu (te), and Urdu (ur).
The two-letter codes in brackets specify the target language for speech conversion.
For example: gTTS(text=translated_text, lang=dest_lang).
Speech conversion between languages is straightforward—simply adjust the source and target language codes. For instance, Gujarati speech can be translated into Spanish by updating the relevant codes.
| Bill of Materials | |
| Components | Quantity |
| Raspberry Pi Zero board (MOD 1) | 1 |
| SPI TFT display (MOD 2) | 1 |
| PAM8403 module (MOD 3) | 1 |
| Switch (S1, S2) | 2 |
| Resistors 270Ω (R1, R2) | 2 |
| Resistors 150Ω (R3, R4) | 2 |
| 10µF electrolytic capacitors, 16V (C1, C2) | 2 |
| 0.1µF ceramic capacitors (C3, C4) | 2 |
| 5V DC, 2A power supply adaptor | 1 |
| Speaker 5W | 2 |
| USB microphone1 | 1 |
Additionally, Google Text-To-Speech (gTTS) supports numerous international languages, such as Arabic (ar), Chinese Simplified (zh), Chinese Traditional (zh-tw), Czech (cs), Danish (da), Dutch (nl), English (en), Filipino (fil), Finnish (fi), French (fr), German (de), Greek (el), Hebrew (he), Hindi (hi), Hungarian (hu), Indonesian (id), Italian (it), Japanese (ja), Korean (ko), Norwegian (no), Polish (pl), Portuguese Brazil (pt-br), Portuguese Portugal (pt), Russian (ru), Spanish (es), Swedish (sv), Thai (th), Turkish (tr), Ukrainian (uk), Vietnamese (vi), and others.
Also Check: Speech Transcription Using Raspberry Pi Zero
The author’s prototype, featuring a 240×320 display and 5W+5W amplifiers, is shown in Fig. 1.
The testing covered English (en), Gujarati (gu), Bengali (bn), and Hindi (hi) for Indian languages, alongside Russian (ru), Spanish (es), and German (de) for international languages.
Table of Contents
So, apart from English, Bengali, Gujarati, and Hindi, the accuracy of the outputs in other languages cannot be verified without additional feedback from expert readers.
Configuration
The device requires a Raspberry Pi Zero installed with the latest Raspbian OS. Python 3 must be installed, along with the required libraries. These can be installed via the Linux terminal using the following commands:
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