Wikipedia pages are being added to, as well as being created today, as part of our edit-a-thon. 

Nguyen Thi Anh Vien, external is one example, updated by the Vietnamese service.  

At the 2014 Asian Games she won Vietnam's first-ever medal in swimming.   

Helen Pankhurst, great granddaughter of the suffragette Emmeline Pankhurst, came into the BBC HQ to work on a Wikipedia profile of someone so far not covered - Lucy-Anne Holmes.

"Lucy did some fantastic work with her no more page 3 campaign , external– she is an amazing woman," says Helen.

Image source, Chloe Dennis

Volcanologist Dr Kayla Iacovino is joining the pages of Wikipedia today and has now been illustrated by Chloe Dennis, external. 

She was chosen by one of this year's BBC 100 Women, American science award winner Erin Mckenney, who said: "Kayla believes strongly in being an advocate for women and a strong role model for women in science."

Hockey player and Olympic gold medal winner Maddie Hinch has come into New Broadcasting House to edit the Wikipedia page for Beth Storry, English Field Hockey goal keeper. 

"Beth is someone I have always wanted to be and deserves to have her page edited to be better," she says.

This lady from Delhi tweeted to tell us about her Wikipedia entry today. 

Hande Kader, a Turkish sex worker and transgender activist, has finally got a Wikipedia page in Turkish. Hande was murdered in August this year, and although she had profiles in six other languages - Catalan, English, Esperanto, French, Italian and Spanish - it's only today that her profile in Turkish has gone live.

Here it is., external

Image source, SENER YILMAZ ASLAN / MOKU

This BBC producer is holding up a picture of Salma Khatun, the first female train driver in Bangladesh.

Her profile has been added to Wikipedia today (it's here, external - in Bengali) along with profiles of Najman Chowdhury, external, an academic who has advised the government and who set up the Women and Gender Studies department in the University of Dhaka, and Rounaq Jahan, external, a political scientist, former UN representative and research centre founder.

In Moscow, journalists at BBC Russian are hearing from Wikipedia volunteer Sophia Bagdasarova. She tells them that although more editors have been joining in on the site, it still has a sexism situation.

A schoolgirl from south London who visited the BBC's New Broadcasting House headquarters as part of BBC School Report, external chose to work on a profile about Nigerian wedding planner Funke-Bucknor Obruthe. Funke is one of this year's 100 Women.  

Fatou said: "I picked Funke as Nigeria is a very male dominated society so it's hard for women to have a great career and family life."

Here's Funke's new Wikipedia article., external

Image source, Layli Foroudi

Image source, Hannah Eachus

"She has an OBE so I always assumed she was on Wikipedia, and was astonished to discover she is not."

So says the BBC's newsreader Jane Hill - she's talking about Sarah Weir, who she nominates for a profile.

Sarah left a career in banking to go into the arts instead. It meant a 90% drop in salary, but she told the Telegraph newspaper, external that her path - which has included working for the arts side of the London Olympics - has been "stimulating, nerve-wracking but never dull".

Jane says: "She is a passionate advocate for the arts and is an excellent role model for gay women, as an out lesbian high up in her field."

Teenage activist June Eric-Odorie is on our list of chosen women for this year and had a Wikipedia profile in English, external, but she now has one in Spanish too.

Maria Sefidari, the co-founder of a group of female Wikipedians in Spain, says the first of today's articles in Spanish is about the teenage writer. 

The BBC's 100 Women season is all about recognising notable women.

And when we found out that fewer than 17% of profiles on Wikipedia are of women, we decided to do something about it and make the internet less sexist.

That's where you come in - male or female, we're asking you to create or amplify articles about women on the site today.

People are joining in at events in Istanbul, Cairo, Dhaka, Jerusalem, Delhi, Abuja, London, Cardiff and more. But if you're inspired, you can do this from home.

Check out this guide, external for Wikipedia's notability criteria.

Entries can be in English or in your own language. 

Here's how:

1. Go to ANY Wikipedia article
2. Highlight the last part of the URL where the person is named - for example https://en.wikipedia.org/wiki/Alicia_Keys
3. Change this to the name of the person you want to add
4. Press enter....
5. It will give you an option to 'Start the Article', click on that.
6. To add Images: On the Toolbar at the top of the page click on 'Insert', then 'Media' to look for Open License images of the person you want to add. Please note you can only add free-to-use pictures of the people you add on Wikipedia.
7. Start editing. You may wish to use 'Visual Editor' (the pen icon on the far right)
8. In 'Edit Summary' pop-up box, please give a short description of what you have done, and don't forget to use the hashtag #100Womenwiki, for example 'I've created a page for Alicia Keys #100Womenwiki'
9. Save the entry and this will "publish" the article.

BBC Indonesia is way ahead on the #100womenwiki project. Journalists there are well into the afternoon and have added notable Indonesian women already. 

Here's a nifty time-lapse video of their day so far.

She was the youngest UK woman to conquer Mount Everest, the world's highest peak.

But on Wikipedia, Tori James doesn't exist.

BBC Wales are working to change that today, and they've found four other notable Welsh women to write entries for.

• The Welsh women the internet forgot

Who's missing from your part of the world? Join in, become an editor - it's easy - and make the internet less sexist. You can do it in any language from home or email BBC100.Women@bbc.co.uk for a time slot to come into New Broadcasting House in London.

One of the BBC's language services, BBC Hausa, is adding notable Nigerian women to Wikipedia today, from Abuja. 

Their pieces of paper say: "Today I made the internet less sexist.”

Check out this Instagram video by former BBC producer Deborah Basckin.

Let's "start closing the gender gap on a site we all use every day", she says.

The founder of Wikipedia, Jimmy Wales, is at the BBC HQ in central London.

On the gender question, he says: "Our community has traditionally come from the tech and computer geek world and as we know for reasons unrelated to Wikipedia, that’s a very male dominated world.

"Our editors, who write what they’re passionate and knowledgeable about, don’t have a completely diverse set of things that they’re interested in in the world.

“This is why it’s really important that we get more women involved in editing Wikipedia because they will know about [different] things and have read different authors.

“In past eras, sexism was really quite bad. A lot of the achievements of women were not well covered in the media nor in books so you have to do a little more research and digging to find out about the amazing early scientists who were women and to write about them.”

Mr Wales is on the BBC World Service's programme Outside Source now (11:00 GMT).

Listen live here.

BBC Hindi has just added Aditi Gupta who founded a website on menstrual health called menstrupedia.com, external. It's a friendly guide for girls to learn about periods. Menstruation is considered a taboo topic in India. 

Here is the link to Aditi's new Wikipedia page, external (in Hindi): 

This participant in Indonesia has been enjoying learning about the editing process and putting entries together.

The BBC’s Indonesia bureau, in conjunction with several other groups including Wikimedia Indonesia, have added two women to the online encyclopaedia.

Erni Suyanti Musabine is a vet who saves endangered tigers. Earlier this year, she told the BBC about her drive to save them from extinction, saying she felt they could understand when she spoke to them. 

Here's her new page, written in Indonesian, external.

Image source, Lynn Savarese

Shandra Waworuntu was a victim of sex trafficking to the US. She has been actively involved in movements to end trafficking in the country, and works with victims as well as lobbying politicians. She wrote about her experiences for the BBC earlier this year, but be warned - it's a potentially upsetting account of terrible things that happened to her and others. This is the link if you want to read about her story.

Her new page, external is here (it's in Indonesian).