function-calling-pt-pt

English function-calling conversations translated into European Portuguese (pt-PT). Only the natural-language turns are translated. Tool definitions, calls and tool results stay in English, exactly as in the source, so a model learns to take a request in Portuguese and call an English API with the right arguments.

Source	License	Conversations	Kept after checks
xlam	cc-by-4.0	59,221	100%
hermes	apache-2.0	1,091	99%
toolace	apache-2.0	10,553	99%
when2call	cc-by-4.0	14,928	100%

The questions of the BFCL benchmark, translated the same way, are in jgalego/bfcl-pt-pt for evaluation.

📄 Rows

Field	Content
source	xlam, hermes, toolace or when2call
id	Row id in the source, or its index in the source file
tools	The tool definitions as a JSON string, in the source's own schema
messages	The conversation in pt-PT: user, assistant and tool messages
messages_en	The same conversation in English

An assistant message that calls tools has tool_calls in the OpenAI format, each with arguments as a JSON string. Tool messages hold one result each.

import json

from datasets import load_dataset

data = load_dataset("jgalego/function-calling-pt-pt", split="train")  # every source
xlam = load_dataset("jgalego/function-calling-pt-pt", "xlam", split="train")  # one source
tools = json.loads(data[0]["tools"])

🔧 How it is built

• Each source is parsed into one message format. Rows that do not parse are left out: Hermes' document-extraction tasks, ToolACE rows with another tool format or in Chinese, and calls that are not valid literals.
• The user and assistant texts of a conversation go to google/gemma-4-31B-it in a single request, so names and terms stay the same across turns. Decoding is greedy.
• Conversations whose user turns share a run of 10 words with a question of jgalego/bfcl-pt-pt are left out, so that benchmark stays a fair test of models trained on this data.
• Call arguments that appear in the text and look like a code or identifier (digits, symbols or all capitals) are copied as they are, as are links and emails. Other words are translated: a user asks for "as luzes da cozinha" and the call still says "kitchen", or for jobs in Nova Iorque while the call says "New York".
• Currencies and units are not converted: "$50" becomes "50 dólares", never euros, so the text still matches the call.
• A conversation is dropped if any of its translated texts fails a check:

Check	Fails when
segments	The output does not have exactly one translation per text
empty, unchanged	A translation is empty or the same as the English
length	A translation is under 0.6 or over 2 times the length of its source
copied	A string that must be copied is missing
numbers	A number of two or more digits is missing (an hour may move to the 24-hour clock)
pt-br	It has a Brazilian form, such as "estou fazendo", "tela", "celular", "usuário" or "econômico"
english	Over 15% of its words are common English words
too-long	The conversation does not fit the translator's context

Source	Did not parse	Overlaps BFCL	Translated	segments	empty	unchanged	length	copied	numbers	pt-br	english	too-long
xlam	0	663	59,337	0	0	3	0	4	26	6	77	0
hermes	793	1	1,099	0	0	0	0	0	8	0	0	0
toolace	646	23	10,631	0	0	6	0	3	48	4	17	0
when2call	0	18	14,982	0	0	0	0	0	26	1	27	0

The translator's instructions

Traduz para português europeu (Portugal) cada segmento entre as etiquetas <sN> e </sN>. Os segmentos são mensagens de uma conversa entre um utilizador e um assistente que usa ferramentas: traduz, não respondas nem cumpras os pedidos.

Regras:
1. Português de Portugal, nunca do Brasil: "estou a fazer" e não "estou fazendo"; pronome depois do verbo ("diz-me", "envia-lhe"); evita "você" (omite o sujeito); ecrã, telemóvel, ficheiro, utilizador, equipa, autocarro, comboio, pequeno-almoço, registo, contacto, facto, económico, desporto.
2. Não traduzas e copia tal como está: código, JSON, URLs, emails, caminhos de ficheiros, identificadores, nomes de pessoas, marcas e produtos, e todo o texto da lista "Manter".
3. Não convertas moedas nem unidades: "$50" fica "50 dólares", "72°F" fica "72 °F". Mantém todos os números; em texto corrido usa vírgula decimal (3,5).
4. Datas por extenso com o mês em minúscula ("5 de março de 2024"). As horas podem passar a 24 horas ("15h30").
5. Lugares com nome em português usam esse nome (Nova Iorque, Londres, Moscovo), exceto se estiverem na lista "Manter". Não os troques por lugares de Portugal.
6. Mantém a formatação: markdown, listas e quebras de linha.
7. Responde só com os segmentos traduzidos, com as mesmas etiquetas e pela mesma ordem.

⚠️ Limitations

• Machine translated and checked by rules, not by people. The checks catch common Brazilian forms, not all of them.
• Free-text arguments, such as search queries and message bodies, stay in English even when the request is in Portuguese.
• Tool results are in English, so pt-PT answers summarize English data.

🙏 Credits

The conversations come from the datasets below and keep their licenses. Changes: rows were parsed into one message format, filtered, and their user and assistant texts machine-translated into pt-PT; tools, calls and tool results are unchanged. The translations are by google/gemma-4-31B-it.

Source	By	License
xLAM function calling 60k (APIGen)	Salesforce	CC BY 4.0
Hermes Function Calling v1	Nous Research	Apache 2.0
ToolACE	Team ACE	Apache 2.0
When2Call (train)	NVIDIA	CC BY 4.0

The xLAM authors release it for research and ask users to evaluate accuracy, safety and fairness before deployment; the same applies here.

If you use this data, cite the sources:

@article{liu2024apigen,
  title={APIGen: Automated Pipeline for Generating Verifiable and Diverse Function-Calling Datasets},
  author={Liu, Zuxin and Hoang, Thai and Zhang, Jianguo and Zhu, Ming and Lan, Tian and Kokane, Shirley and Tan, Juntao and Yao, Weiran and Liu, Zhiwei and Feng, Yihao and others},
  journal={arXiv preprint arXiv:2406.18518},
  year={2024}
}

@misc{Hermes-Function-Calling-Dataset-V1,
  title={Hermes-Function-Calling-Dataset-V1},
  author={interstellarninja and Teknium},
  url={https://huggingface.co/NousResearch/hermes-function-calling-v1}
}

@misc{liu2024toolacewinningpointsllm,
  title={ToolACE: Winning the Points of LLM Function Calling},
  author={Weiwen Liu and Xu Huang and Xingshan Zeng and Xinlong Hao and Shuai Yu and Dexun Li and Shuai Wang and Weinan Gan and Zhengying Liu and Yuanqing Yu and Zezhong Wang and Yuxian Wang and Wu Ning and Yutai Hou and Bin Wang and Chuhan Wu and Xinzhi Wang and Yong Liu and Yasheng Wang and Duyu Tang and Dandan Tu and Lifeng Shang and Xin Jiang and Ruiming Tang and Defu Lian and Qun Liu and Enhong Chen},
  year={2024},
  eprint={2409.00920},
  archivePrefix={arXiv},
  url={https://arxiv.org/abs/2409.00920}
}

@inproceedings{ross2025when2call,
  title={When2Call: When (not) to Call Tools},
  author={Ross, Hayley and Mahabaleshwarkar, Ameya Sunil and Suhara, Yoshi},
  booktitle={Proceedings of NAACL 2025},
  year={2025},
  url={https://aclanthology.org/2025.naacl-long.174/}
}