Hanga Speech to Text: Preserving a Ghanaian Language with AI

Introduction

Hanga (also known as Haŋa) is a Gur language spoken by around 10,000 people in the northern part of Ghana, particularly in the Bole District and the Savannah Region. Like many minority languages, Hanga faces challenges in the digital age: limited online content, few transcription tools, and a lack of subtitle generation for videos. Yet the Hanga people have a rich oral tradition, from folktales to historical narratives, that deserves to be preserved and shared. Speechyou's Hanga speech to text service offers a powerful solution, enabling anyone to transcribe Hanga audio, create subtitles, and open up the language to new audiences.

Where is Hanga Spoken?

Hanga is primarily spoken in the Bole District of the Savannah Region, Ghana. There are also small communities of Hanga speakers in the neighbouring West Gonja District and in the capital, Accra, due to migration. The language is closely related to Mampruli and Dagbani, but it has its own distinct lexicon and tonal patterns. The two main dialects are Western Hanga and Eastern Hanga, with minor lexical differences. The Latin script is used for writing, with an orthography that includes special characters like ŋ (eng) for the velar nasal.

Why Accurate Speech to Text for Hanga Matters

For a language with a small speaker population, any tool that helps document and disseminate spoken content is invaluable. Here are some key reasons why accurate Hanga speech recognition is important:

• Preservation of oral history: Elders' stories and songs can be transcribed and archived.
• Education: Teachers can create subtitled videos for literacy programmes.
• Media: Community radio stations can produce transcripts for their programmes.
• Accessibility: Hearing-impaired members of the community can access video content through Hanga subtitles.

Without ASR, creating transcripts and subtitles is a slow, manual process. Speechyou automates this, delivering high-quality results in minutes.

Specific Transcription Challenges for Hanga

Transcribing Hanga automatically is not trivial. The language presents several challenges:

• Tone: Hanga is a tonal language, typically with two tones (high and low). The same phonetic segment can have different meanings depending on tone. For example, kpaa (high tone) means 'to cut', while kpaa (low tone) means 'to clear weeds'. Speechyou's model is trained on tonal data to distinguish these.
• Vowel harmony: Hanga exhibits harmony in vowels, where vowels in a word share a certain feature (e.g., advanced tongue root). This affects the phonetic realisation and needs to be handled by the ASR.
• Limited training data: As a low-resource language, there is little publicly available transcribed speech. Speechyou uses transfer learning from related Gur languages and fine-tuning on a small corpus of Hanga recordings to achieve high accuracy.
• Dialect variation: Western and Eastern Hanga differ in some words and pronunciations. Speechyou's model is trained on both varieties to ensure robust performance.

Use Cases in Practice

Oral History and Archives

Researchers at the University of Ghana can use Speechyou to transcribe Hanga folk tales recorded in villages. The resulting texts can be indexed and searched, preserving the stories for future generations.

Community Radio

Radio stations like Bole FM broadcast in Hanga. By using Speechyou, they can automatically generate transcripts of talk shows and news segments, making it easier to repurpose content for blogs or social media.

YouTube Content Creators

Hanga-speaking YouTubers can add Hanga subtitles to their videos using Speechyou's SRT/VTT export. This helps reach a wider audience, including those who are hard of hearing or who prefer to read along.

Church and Religious Groups

Many churches in the Hanga area use the language for services. Transcribing sermons allows for study and distribution of teachings. Speechyou makes this quick and affordable.

Language Learning

Schools developing Hanga curriculum materials can use Speechyou to create subtitled videos for students. The transcriptions also serve as reading materials.

How Speechyou Helps

Speechyou provides a dedicated Hanga speech to text model that is accessible via a simple web interface. Users upload audio or video files, and within minutes receive a transcript in standard Hanga orthography. The system also generates SRT and VTT subtitle files, which can be directly uploaded to YouTube or other platforms. Key features include:

• Support for both Western and Eastern Hanga dialects
• High accuracy (95%+ on clean audio)
• Unlimited transcription on the Solo plan
• Output in plain text, SRT, or VTT
• No need for custom training or technical expertise

Conclusion

The Hanga language is a vital part of Ghana's cultural heritage, and with Speechyou, it can now thrive in the digital space. From transcribing oral histories to subtitling videos, our AI-powered tool makes it easy to work with Hanga audio. Whether you are a linguist, a teacher, a content creator, or a community member, Speechyou empowers you to preserve and promote Hanga. Try Hanga speech to text today and see how effortlessly you can turn spoken words into text.